But that's not the kind of humor Jim was about; even with Statler and Waldorf, they may have heckled the other Muppets (Fozzie in particular), but they were never intended to be mean-spirited. Caroll learned the hard way about going too far when he ad-libbed Oscar saying to Paul Simon, "So long, shorty!" Caroll could see he genuinely hurt Paul Simon when he said that. You have to know where to cross the line: even Don Rickles knows that, and has made it clear many times before that he never insults people with the intention of being mean or trying to hurt their feelings, it's just a way for him to actually interact with this audience and others around them in a no hard feelings routine; people like Chelsea Handler (and Joan Rivers) on the other hand, they do intentionally say things with mean-spirited intentions, and even when they do go too far, they couldn't care less.