Ya, it's a ridiculous example but I'm just pointing out the difficulty of codifying vigilantism into law. If illegally killing people who double park is not appropriate, is stealing their TV appropriate? Is hacking their email account appropriate? Who can appropriately be a vigilante? Is it appropriate for a victim who suffered physical injuries? Is it appropriate for a victim who felt offended? Is it appropriate for an eye witness? Is it appropriate for someone who saw it online?