A lot of the jokes wouldn't be allowed today...
Nearly every joke about homosexuality in the show refers to it as a "lifestyle choice" or "decision"...today that would be really taboo.
Plus, the show did have a whole bunch of scenes which included animal abuse (Rags especially).
I love the show, I even tolerate the post Heather Locklear phase (she ruined the show, not the writing or the other cast members...her presence was awful and her story lines were shallow and pointless), but those things would have been impossible to air on ABC today.