I disagree. I don't think the dunk was a charge. I watched the replay, and Rip's feet were not set. In fact, at the moment of contact betweent the 2 players, Rip's momentum was actually carrying him FORWARD into Horry (Rip was on the tips of his toes at the moment of contact). A camera angle from behind the goal clearly showed the Rip initiated the contact.
That said, I saw enough slaps on the arms (that counted as blocked shots for the pistons), and elbows to the face (that went as no-calls) to know that the pistons fans can kiss my @ss.