I have a good friend in MI that co-signed on a bike for a supposed friend of his. Said friend started to 'forget' to make payments on the bike. He took the bike out of state and refused to bring it back. Now my friend's credit is fucked...and he lives like 4 houses away from this tool. The ONLY reason we havent gone over there and fucked his shit up, is that he lives nearby and his family is priority #1. We wouldn't want something happening to his kids or his wife..property..etc. Long story short, like someone else said before, if you don't plan on moving away anytime soon..use the kill him with kindness idea. TRUST ME, it will eat him alive. Go overboard with it. Video tape it if you can..you'll die laughing later. If you retaliate, and trust me I feel you on that, you will just escalate this and eventually the cops will get called or someone will get hurt. In the end, you will have regretted taking it that far. Said friend in moving to Cleveland in the next few months. We plan on paying dude a visit after he's long gone and making a few improvements to his lot. He can't prove who it was and friend will have been moved out of the STATE for months. If needed, revenge is a dish best served cold.