Im sorry to hear about your bike. =< but it doesnt surprise me in the least.

someone stole our plastic lawn roosters that we had nailed onto our gate posts. whoever did it went through awful lot of trouble to do so too cuz they were nailed in good.
i also know some people who have had their gates stolen cuz they didnt install them properly so we lucked out there...

also someone broke a window out of my moms car an stole her ashtray.
i kinda laugh about that. my mom woulda gave it to the person had they asked.