Gather 'round children. Tell use your tales of horror.
I have but a few, but we all likely have some. I have two that come to memory, and I just told one on Twitter, so here is the other:
After having moved around the state a bit, I decided to pop back into my old local game group, which I haven't regularly attended in 3 years. They were a bastion of good people. Every Wednesday night, like clockwork, 8 or 9 normal, intelligent Euro game fans would gather in the party room of a local bowling alley. Stranger, this was a 100% open meetup, with a thread on BGG that had been pulling in new players like myself for many years. What was their secret?!
Luck. Dumb fucking luck. When I showed up, following my long absence, one new player stuck out like a sore thumb. As we sat down to play Roll for the Galaxy, I could tell this group was already onto his shit. As he fumbled to take his first turn, two players take out their phones and start timing him. From that turn on, he is given a post-turn admonishment informing him how much longer he took than every other player.
We then decided to play a few rounds of The Game (if you haven't played it, just picture Hanabi where you can see your own cards but can't communicate), and it became painfully obvious that this man is a complete idiot. Near the end of the second game, where the draw deck is empty and we just have to get around the table two more times, he decides he is going to play multiple cards on his first change. The entire table is yelling at him not to do this. Begging him. Ultimately he decides to do it anyway because he feels it really is the smart play. We lose the game.
At the moment our defeat is sealed. I seized the opportunity. The defeat is in the books, but we can rewind time. Everyone takes back their cards, and I force Mr. Idiot to now only play one card. We all go around the table for two turns, playing the same exact cards. We would have won The Game. Death stares ensued.
I don't know what they'll do with this fine gentleman, but if they don't fix their people problem, and I ever find myself back there, I'd head home rather than do all of that over again.