Although cool, this is something with a limited lifespan -- Wikipedia actually plans to break the ability to do this by masking IPs even for anonymous users. See: https://meta.wikimedia.org/wiki/IP_Editing:_Privacy_Enhancem...
Honestly I'm surprised Wikipedia hasn't had a case like Reddit's harassment of innocent people after the Boston Marathon Bombings, given how tribal and jingoistic the most-active editors are.