Offensive comments and threats should be grounds for support booting someone, and if that's the issue it would seem a better way to go than by asking select owners in the world to vote in secrecy. If just being obnoxious were grounds for removal, there'd be a lot fewer players in HBD (I realize it goes beyond "obnoxious" here, but if a vote could remove any owner that would not always be the case). Would support want to set a precedent of removing someone because 10 of the 14 people the commissioner decided to have vote agreed, unless that were the process spelled out in world rules? I doubt it. I don't think support would back a worldwide vote, either, but in this case ginobilli04 stated that he would abide by such a vote so they would.
One question for those in more worlds than the three I've been part of: mlownds posted "Most private leagues have a veteran's committee to help with these decisions." Is that accurate? I've never heard of a committee with the power to decide who can remain and who cannot, beyond ruling on violations of or appeals related to world rules.