I have played a lot of Scrabble online at the Internet Scrabble Club. It is a regular occurrence there for players to curse at you, insult you, accuse you of cheating, and curse at you some more.
I have never played anyone here who is not courteous and friendly. I don't know why there is such a stark difference, but it is really nice to be here. I feel like we are all friends. I have made several friends at ISC, and the majority are not abusive, but a very large minority are. Maybe it's something about Scrabble.