How not to lock your bike up

I believe there's an error in the title, should read:
"How to not lock your bike up"

Could that be a police decoy bike?
A few months ago i noticed some bikes locked with cheap cable locks in places i've never seen bikes before on my way to work, they seemed to stay a week or so.

a girl at my office the other day had chain locked her bike around the stem. i pulled the lock over the bars, took a photo of her now unlocked bike, and emailed her the picture.

I'm equally amazed by that seat. WTF is that???

I regularly see bikes locked with a D-lock over a sheffield stand (but *not* through any part of the bike) and then an extender cable threaded through the bike and the D-lock, so using an expensive D-lock as a really big padlock.

I suspect a lot of people think that so long as there's a lock on it somewhere then it *looks* locked up and its safe (regardless of whether the lock is actually, er, locking the bike to somethign solid).

Not a very clever cyclist, however this is how David Cameron had his bike stolen a few years ago and now he's Prime Minister.

At work the other day, a nice hybrid was locked up nicely with a kryptonite lock and wire to a Sheffield stand. I mean, next to a stand, because whomever forgot to get the shackle around the stand...

I put it in the locked shed, but...

Basically, my nightmare!

Obviously needs locking up cause of the dual front braking system.

In my time I've seen a bike D-locked to a wooden chair and all you had to do was lift the chair out of the lock. Strolling through Bristol centre one night I spotted three disc braked hybrids with the wheels unlocked but the frames were locked to sheffield stands.