As discussed before, the problem with Shaq is that the rule-book simply can't accomodate his size and strength.
Name one decent post-player who doesn't use his body to create space in the paint. Every player is gonna push with his legs, hips, back, shoulders, elbows, etc.
However, when Shaq tries to create space, it is extremely obvious.
Reminds of a flagrant foul that was called on Shaq. It was against the Spurs, 4-5 years ago. I think Avery Johnson was driving baseline to the basket, Shaq jumped up and bumped Avery with his hip. Of course, Avery flies in the air for several feet and lands hard. Flagrant foul on Shaq. But it was simply a solid foul. If Derek Fisher had done the same thing to Avery, it wouldn't have been an issue.