None of this will happen. Those kind won’t bother going to Celebration in the first place. There’s a big difference between the anonymity provided by the internet and facing others in real life.
I agree with you, but I also understand just how polarizing the fans at Celebration will be because of the negative effects that The Last Jedi made on the fanbase, even though I love Episode VIII and would go as far to say it is the second of third most important installment in the franchise, based on what it did technically and within the narrative.