Trust someone not to take it? A couple months ago I was in Buffalo Wild Wings for an hour, and when I came out, someone had CUT my helmet off the helmet lock, leaving just the D-rings behind. Yeah, that's great, reduce a $450 helmet to garbage. I doubt the person who did it has access to an upholstery sewing machine to put new rings on, will just wear it for show, or possibly let his hoochy mama wear it when he takes her out for a spin to Beale Street on Saturday night. I am now only leaving the helmet locked on the bike when I will not be gone long, or when I am comfortable that I can see the bike from where I will be.