Clone Griefers.

Hello today i have joined server, there was griefer elvis_2011, i banned him cause i catched him griefing. Then scion_2011 came On he act cool. Then when i came back from high-school then i used command help information for adv builder there was command Clones then i though it was strange that there is Elvis_2011 and Scion_2011 i checked scion it's not him then checked elvisap - not. Then i used for Elvis_2011 and then there is Scion and some more i guess. So i want you guys to check out for clones. They all have OP names i guess with _2011!