PRT servers are the most uptight servers ingame. I don't entirely understand why they are like that, though I do respect their opinion of prejudice against everything but what they think, do or say because it is their server. So in my defence I always just leave after entering their server(s) and realizing which one it is again, which does not take long, considering their prejudice can begin after a simple voiced complaint that you would prefer not to be TK'd by a PRT member...again. In essence, I suppose I have banned myself.
Asking to be unbanned from a PRT server is like asking someone to punch you in the face while you hold your hands behind your back.
If PRT banned King Alden then I can only assume that King Alden didn't fit into their whole Jehovah's Witness theme they have going on. But I must simply state that it is their server and they can of course do anything they like with it, and also ban anyone they see fit. Besides, God knows they only ban the good players. Consider it a compliment.
P.S. maybe it's time for a hoboknight server. Unless their already is one, I did not check.