Where do people play multiplayer?

[76.IAP Männis]

Talking about warbirdsofprey.org
I've been banned from there, the admins telling me that i'm not who I am
It seems they banned a entire german squadron becouse of missbehaviour, but instead of shuting down every single one, they've banned a major part of the city of darmstadt
That's kept them out allright, with a whole load of other people including me who haven't done anything. But how do you prove online that you realy are who you're saing you are?