An emo friend of mine was robbed once, and I thought he deserved it for being emo scum. Even so, I had a deep hatred of robbers and criminals in general, so I told him I'd help him to look around and see if we could find the guy. Then we stuffed a backpack with makeshift weapons (Lightbulbs, scissors, a hammer, etc...) and started biking around the neighborhood. It was obviously madness, but we felt like hitting someone. Hard. I had recently been robbed, and was looking forward to smashing the guy's face. Then we found him. We hadn't expected to find anything, but we did. The emo dude was wearing the backpack. We slowly approached the robber. He said: "Hey... What's... Uh..." We just stared at him. He took out a pocket knife and said: "What, do you think I'm a robber or something?" I was about to say some witty one-liner or something when I looked beside me. The emo dude was running away. With the backpack. I looked the robber in the eye once more. Needless to say, I ran like there was no tomorrow. I haven't talked to the emo dude in a while, but he knows what he did. I hope he feels bad about it forever. The robber is still out there. Probably confused. I really hope I can find him again... Some day.
TL;DR? Basically, a failed attempt at vigilantism. Involves betrayal by emo scum.