I left my motorcycle helmet attached to a motorcycle for YEARS in high-crime areas and never had it stolen (arguably worth more than a bicycle helmet -- but who

I left my motorcycle helmet attached to a motorcycle for YEARS in high-crime areas and never had it stolen (arguably worth more than a bicycle helmet -- but who really wants to buy a used helmet). Realize it's an anecdote but honestly I don't see the big risk in leaving the helmet on the bike when you go in the bar.