I pretty much agree with what has been said. Me and a buddy of mine have a long standing rivalry of trying to guess each others passwords or if someone leaves their account open while they're not at the computer, free reign to make comments. It's usually something like "My name is Jake and I'm a big fat asshole". But I think either of us would be upset if the other person touched the roster or accepted a trade.
With that said, your friends being a little punk about the whole situation. There was no need send out an email to the entire league and this should not alleviate him from his responsibility to pay into the league.
Edit: I thought I heard Hookem say that Texans Talk would change ahole to Bud Adams. I was looking forward to that.