Hey, in a vigilante related story, I don't think I told you guys about my BIL and his girlfriend...
They live in an apt. in Chicago, city proper. One day in July, her bike was stolen from their basement area storage.
They were ticked and filed a police report, but there's not much more to do - that was for insurance more than anything.
But she needed a bike, so they went on Craig's List and FOUND HER BIKE! So he went (with a friend. He is skinny and not intimidating) and made an appointment to "see it". They had called the police, but they wanted to use her as bait and he didn't feel good about that... So anyway, he "test rode" it, then said, "Hey, I'd like to buy it, but the problem is that YOU TOOK IT FROM MY HOUSE."
The guy claimed that he bought it off a homeless guy for $10 and wanted to turn a quick profit, but who knows? He gave it up without a fight, but now they're a little nervous because if he WAS the thief, he obviously knows where they live!