Again, as was pointed out, he was banned before he got the chance to change it. I don't know what all he was banned from, so I can't tell you if he could or why he didn't point it out to somebody, but chances are he probably wouldn't have been able to do anything about it anyway.
He was only banned from EoEO and WE. He was not banned from any other forums, nor was his use of PMs disabled. Basically, "it's a little late now."

If Brandon Vega died years ago, why would somebody even make the connection between him and the Pope?
*WOOSH*