What do you do with your helmet when you lock up
When I lock up, I just leave the helmet dangling from a brake lever, out of sheer laziness. I don't even bother bending down and putting a helmet strap through my lock. I've been doing this out of habit for as long as I remember and I've never had anyone nick a helmet. Most likely because I doubt thieves will be like "OMG SWEET! NOW I CAN BE SAFE!"
I've left some pretty nice helmets dangling from the bars, too - Bell Sweep, Limar 969, Giro Monza... never had a problem.
What do you guys do when you lock up? Leave the helmet? Take it with you? Lock it through your lock? Ever had a helmet stolen?