I'm not talking about the most valuable thing, but instead have you ever had something stolen from you and thought, "Why on EARTH would someone bother to steal that?" I recently left my bike at a train station here in Germany, and I chained up the bike, but left my helmet securely on the seat. I also left a 40 euro cateye light barely attached to the thing. What did someone choose to steal? The helmet, they left the light unmolested.....No idea what they could do with it, not worth anything and now that means I have to go buy a new helmet which is made even more difficult by the fact that I have a huge head and when I bought this helmet it was the only one in the entire store that fit me. And this is a HUGE bike shop we are talking about! Anyway, what dumb things have you had stolen from you?