Cycling to annual corporate social event: would you?

[lph]

I have never locked up my helmet to my bike.

Why not? The way I lock my helmet, with the lock going through an air vent or the strap at the back of the neck, you'd have to wreck the helmet to get it loose. I like my helmets too, but I like my bike even more, and have no qualms about locking it up outside.