OP's post is an issue of the DF. With out the DF we would be finding groups on our own servers and stuff like this would be a minority but with the DF there is no need to worry about how people will interact with out on your home server because of your behavior.

I feel the DF breaks a community more then it helps it (cross server filling slots) if it was only your server issues like this wouldnt be as pronounced.

Nobody really looks for a group with the DF going so there is no real community built.