Just got a helmet, and am a bit anxious everytime I leave it with my bike. I go to class, and lock it with the U-lock. And I'm wondering, what are the incidences of getting it ripped (cut) off? Should I just not bother worrying and leave it, or should I just lug it around, dangling by my side, as if to say: "Yeah, I cycle. What's up?"
I see motorcyclists leave their helmets all the time, and those are heaps more expensive than mine, but hardly ever with bikes.