Yes, there are people who care. Nobody likes cheating. Tournaments are run by fellow members and as much as they can, they do seem to check as much as possible. Some members remove people (usually pawns) who have not played X amount of games, or don't have an established rating. But this is best said at the tournaments board. My point is that members run tournaments how they see fit. If you think there is a cheat in the tournament, write to the creator about it, or just don't play in that one yourself.