Thats what i meant, actually.

He just needs to know when enough is enough, and by saying that, i put my foot down.

He can express his views and opinions and feelings, just aslong as he doesnt try and ruin somebody else's day doing it.

As an example:

Calling staff members retarted... I wouldn't appreciate that. Expecially when he's getting so many other people anti-flag. (or so to speak..)