[not2b]

Who told you that? The word "open" is one of the most overused words in American marketing, and has never been an implicit grant of rights to anyone. People were routinely banned from project mailing lists long before codes of conduct became common, and corporate projects labeled "open" were often completely closed.

[watwut]

I think that require to leave legally refers to situation where that person comes back again and again and again. So that you may use your lawyer to threaten him or his layer.