Dragonblade
Adventurer
As a DM you are allowed to make rulings of the kind and do not have to tollerate unsporting or disruptive behavior. Note that I'm NOT an RPGA authority. There are guidelines. RPGA Penalty Guidelines Though I think they are a bit out of date, I think there are changes to those.
If that's the case it seems like there are two issues with the RPGA being brought up in this thread. Disruptive players is one, but DMs too tolerant of their nonsense is another.