There are players that we call "dirty", but Dwyane Wade is more than a dirty or cheap player. He INTENTIONALLY TRIES TO INJURE OTHER PLAYERS. Early in Game 3 of the Boston-Miami series, he pulled down Pierce as he was falling to the floor after being fouled on a layup. In the third quarter of the same game, he pulled down Rajon Rondo after being tangled with him, it was OBVIOUS that he wanted to injure Rondo, even if he didn't, he was happy that it happened. Later, he also tried to injure Ray Allen. You can say that D-Wade is a total [jerk]. And the Rondo injury eventually cost the Celtics the series. Also in Game 1 of the Eastern Conference Finals, when he got baptized by Taj Gibson, I actually thought he wasn't going for the ball. He was going for Gibson's face or trying to go underneath him. Gibson would have landed badly if he didn't hang on the rim. Also in Game 2, he elbowed Omer Asik's chin. He was sticking out his elbow while going in for a layup. He knew Asik was gonna go for the block, so he stuck out his elbow while going for the layup, typical Wade.
There are dirty players like Dwight Howard, Kevin Garnett (as C's haters say), Andrew Bynum, formerly Bruce Bowen, Ron Artest, Jeff Foster, and Kurt Thomas. Those players, however, never intentionally injure other players (except maybe Artest). Bynum did try to hurt Barea intentionally, but he apologized and said he was ashamed of himself (unlike Dwyane Wade who was actually proud of himself after injuring Rondo)