I stole from a local conveniance store when I was 11 or 12 and my brother ratted me out to the parents. I'm glad he did, though. It was the first and last time I stole anything.
I've had bikes stolen from me, and I can't comprehend how someone can be so selfish. I've also had people walk right into my house, into my kitchen, and steal things why no one is home. I had someone steal my chicken dinner while another few steps would have netted them cash o_O.