What's the pettiest thing you've ever done?
I stole library books once. When I went to get a new card (after I lost my old one), I was told I needed I.D to do it. Fair enough, I walked home and got my drivers licence. When I returned, I was told I had 23 books out (which I didn't - hadn't had my library card since I lost it a few days before), and had to pay for the replacement (a grand total of over $200). I refused, saying that I'd lost my card and hadn't borrowed the books, but apparently there's no proof that I didn't, so I foot the bill.
I didn't pay but a while ago I got a note requiring me to pay. So I paid and promptly stole the worth of that money in books because those people are terrible (the last time I had to deal with them they wouldn't let me borrow a phone to call my mum, and made me walk home, in the dark, through a really bad neighbourhood. I'm a 17 year old 'girl'.)