Gaming is supposed to be a fun social activity. Subjecting yourself to annoying players week after week is always your choice. You CAN say no to people if you know that they will spoil the fun of the game for others. Not only CAN you say no, it is your DUTY to tell them no as DM to preserve a good game for your decent players. The fate of a DM who puts up with annoying idiots is being doomed to eventually have nothing but a table full of them to play with.
Why are their rights less important than those of someone who spoils a good time for the group.
A D&D play group is first and foremost a social group. When it comes to individual rights, the rights of those who DON'T disrupt the group should come first.
Most important points here, imho, bolded by me.
THIS. All this. Forward THIS to this girlfriend [who is kind enough to TELL YOU how to behave when she and her
BF showup through a third party]. Forward this directly to her.
Include the attachment with the points of organized play and the rights of organizers to tell others not to return and/or eject people from play.
Then tell her
she and her boyfriend can make whichever bed they care to lie in.
This nonsense has gone on long enough...and certainly taken up more thread-reading/post-writing time than it deserves.
I will agree with whomever posted about (noting you've had repeated threads about this same problem person) this is a recurring very obvious problem. You know the very obvious answer. Take the stand that needs taking. Discipline these folks instead of enabling and rationalizing the bad behavior...and that is regardless of whether or not you choose to maintain [what you apparently define as] a "friendship." I myself would have walked away from these people years ago.
Hopefully, the only next thread we ever see about this group of numbnuts, is how much better everything has been going since you acted in your own and your groups' best interests (not these individuals') ... or how much happier you are with your new gaming group.
I wish you all the best with the situation. I really do. But it seems a momentary hardship in your gaming is well worth a long term enjoyment for yourself and all of the other non-drama-makers at these events.