Ever had any repercussions for reporting a road offense?

I was on a jury that found a guy guilty of a drug offence, he got a fine and probation.

Later I was having a coffee in a coffee shop near the court when the defendant walked in, saw me and said, 'don't worry mate, I got justice'.

I did once, many years ago, not press charges in a road rage incident - depsite the police being very keen for me to do so!

Perpetrator was a proper nutter and as no physical harm had been done, I decided 'security through obscurity' was a better choice, as I'd had enough mental anguish.

It depends on your personal circumstances at the time. If the same were to happen to me nowadays, I'd probably take it all the way through the courts. I have also reported a few more minor incidents, one that did result in a fine and points. I've not had any comeback from it (nor would I expect any, it's not exactly a major deal getting a few hundred quid fine and 5 points).

Ok not cycling related and long but.....

My wife was taking the shop earnings to the bank a few years ago. She was standing in a queue with one person in front waiting to be served with several men behind. Suddenly she was pushed to one side by two men who had run in and who tried to rob the person taking his restaurant earnings in. At the time all she saw was two people pushing someone around and wanted to stop someone getting hurt so she waded in pushing the robbers off the victim. In the meantime, of the others in the bank, one man ran out as fast as possible, the banking staff hit the shutters and went into the back and the others in the queue stood around. Anyway, because she went in on them, it surprised them and they ran away with only some of the spoils. However that wasn't the end of it because they then tried to get back in as it turned out she had forced one to drop his mobile phone. She held the door shut, screaming for the bank staff to lock the door and finally had help from the others in the queue to keep them out until they ran off to the getaway car.  From the phone they got the details of the owner AND the 'getaway driver' who phoned to find out why they were attacking the door. 
After the incident, she was the only one in the bank (apart from the victim) who agreed to give evidence and would testify in court. (Along with a woman who saw saw the car occupants acting suspiciously from her front room a few minutes before the incident). She agreed even though a stupid workmate kept telling her they will come and find her and stab her. Her reasoning was if she didn't and they went out and hurt someone else, then she would feel terrible. Anyway on the day in court, she didn't need to testify as the scrote pleaded guilty when they knew witnesses had turned up. 

TLDR; submit evidence and if needs be testify as it is other people you could be helping in the long run. Also, don't commit crime near my Mrs. 

(This wasn't her first encounter with a robber. When she worked in a video shop, a robber came in, put a sharp blade to her leg and told her to hand over all the money, she pushed his hand away and sprayed him in the face with fly spray she happened to be holding. Unfortunately as he spun away the blade sliced through the tendons in one finger which couldn't be fixed so she has a permanently bent ring finger. That was 15 years before the bank incident and she still waded in..)
 

the wording Suffolk/Norfolk police use on the submission form is if you tick the not prepared to attend trial box, they simply wont prosecute or take the report any further, they certainly treat it as kind of just part of the process you have to accept if you want them to do anything with it.

which is something that does cause me doubt about submitting sometimes, how will some of these people react to being dobbed into the police for their c*****y driving, and Im certainly less likely to submit stuff that close to where I live as a result, as the chances of them being people who literally live only a street away rises substantially and Im much more likely to encounter them again.

its like as if being a cyclist on the road didnt make you feel vulnerable enough as it was sometimes, to then think people might then try to target you as payback is even more unnerving I think

though much like everyone else Ive not heard of anyone directly being intimidated as a result of a close pass submission, but Im just not sure I would unless it made the papers as a big story.

I think that's quite a common reaction as most people aren't used to interacting with the police and dodgy people.

I've never heard of anyone being targetted by a driver that they've reported so I reckon the chances of it happening are very small. If it did happen, then I'd guess you could inform the police of your suspicions and I'd imagine they'd take a very dim view of witness intimidation. Another way to think about it is that the driver is less likely to attack you at a later date as they'd be worried about getting caught on camera (again).

I now usually do as Rendel suggests - don't bother confronting the driver when the incident happens and just let the video/police do the talking for you though that's more because it's usually futile trying to get your point across with an idiot and it just gets you angry/upset for little gain.

I must admit that due to my concern about this I've stopped informing drivers that they've been caught on camera, if their behaviour's bad enough I just send it in and in the vast majority of cases they get an FPN and will have no idea it was me, so hopefully won't be able to take revenge on the road. 

In terms of going to court and being seen by the defendant, certainly the Met form has an option to say that you are not prepared to attend trial if it goes to court. How much this affects any decision to prosecute, I couldn't say, I've never ticked it.

Have to say though, I've never heard of anyone having any retribution visited upon them for making a video report. CyclingMikey reports hundreds of drivers a year and his areas of operation are well known, and although he gets a lot of threats from anonymous cowards on socials he hasn't, as far as I know, had anyone come after him.

Yeah, this is a normal victim response, the flip side of inventing lasting and painful tortures for the perpetrators. (Or is that just me?)
When I was victim of a road rage assault I marked the activity private on Strava just in case, and if I'm expecting to ride that road I don't wear the same kit as I did on the day. I avoided it for a good three months because it's one of those rural roads only local residents would use so the chance of encountering the cockwomble again was high.