Anyways, on-topic.

A friend of mine was in a Con game where the DM refused to actually acknowledge anything she said, or really that she was even at the table. My male friends who were with her were dumbstruck that they had to relay anything she said about in-game actions or speech to them first before the DM would do anything about it. She couldn't get her head around how someone could actually act like that, but he literally did not seem to accept she was part of the game except that her character seemed to be doing things. Everyone stuck around for the game to see how bad it could get, except one who texted everyone under the table that he was running for it before leaving "to take an important phone call."

There were other shitty things in the game as well as the guy was (rather famously) self-important on top of his misogyny. At one point the DM mentions that there's a crack in the wall, and a friendly eighteen year old guy who'd joined my friends in the game said, "I smoke it!" and got a chuckle. The DM flips his fucking lid and begins yelling at the poor kid that it's an official RPGA event and how dare he bring that sort of disgusting thing to the table. My friends tried to defuse it by mocking the DM saying, "Yes, I won't have that fucking language around me," but it was clear that something weird was going on.

The game eventually ended when two of the players had enough of the DM's bizarre goblin pet character, a guide helping the players who was obviously meant to be screamingly funny with painful homophobic humour. After the latest attempt at lisping juvenile bum gags, they nodded to each other and declared surprise attacks on it. The DM couldn't really do anything about it and was at a loss for why anyone would do this, and the game fell apart as everyone took a turn taking out their frustrations on the goblin.