Something needs to be clarified. The show is called Dancing With the Stars not Dancing With the Pros. The pros are hired to coach, choreograph and partner so that the star is showcased within the rules as best as possible.
What, I think, people disliked most Mark is not so much that he breaks rules but that he makes the dances all about him. When he's dancing with his partner his moves far outshine her even though she is a decent dancer. He also does flashy solo bits while his partner is basically doing nothing. The freedance alone showed how much he wants the spotlight. His choice of a sparkley neon green suit pulled your eyes to him while Chelsea almost disappeared in her bare midriff top and black pants.
Of course, all the pros are better dancers than their partners but they don't make the dances all about them.
I guess the producers want the controversy about Mark because it's good for the ratings. I just hope his next partner, if he is back on the show. has the nerve to tell him to knock it off and act like a professional and do his job.