This is my pet peeve. Yes, it's rude to squat in an uncapped game too, but it's not actively taking a slot away from someone else who would like to play the way squatting in a capped game is. The last time I played in a capped game there were a couple of players who were clearly squatting and it pissed me off because I knew some other people who had really wanted to play in the game and would have been active if they'd been able to get in.