Sometimes it doesn't feel quite enough to blacklist a member, when they are doing strange things to annoy you.
I just got beeten by a stronger member, and I have no problem with that. I learn from it, but then he og she doesn't end the game after having bought the last Province, because he/she still has buys. I ask, what we are waiting for, and he/she says: wait for it..., and when I ask for what, he/she says: I have not ended my turn yet, I want to make you wait some, just for fun. I tell her/him, that I have taken a screenshot, and then he/she ends the game - but he/she can still annoy others even if I blacklist her/him?