Hi CaseyV9,
You've made a few points here that deserve consideration on their own. Correct me if I'm wrong, but it appears the first is largely a "do you know this person" the second "how much fortune and fame does that person carry" and the last, "freedom of expression".
With respect to whether or not you personally know someone I don't think has a bearing on anything. It doesn't follow that if you know or don't know them that the joke could be harmful. And despite this, freedom of expression is a wonderful liberty but where does it end? Of course, "offense" can be taken at any point, by anyone, at anything. Heck, I could find your comments offensive (I don't), but that wouldn't be a reason to censor your comments
More interesting is your point about how much fame and fortune was responsible for causing the Jackson phenomenon and whether that therefore affords the joke maker some sort of "right". I don't think it matters at all if you are well known or not, I don't think it has any bearing on conveying the right to cause undue offence whatsoever. With respect to the allegations of child abuse; it's obvious from Jackson's own words that was was quite a bit different to the norm and quite possibly even a paedophile. I guess we'll never know the real answers to this but the jury did find the guy innocent, and so he is. Saying he's a paedophile on an internet forum is liable; although I suspect nobody is going to take you to court over it.
Generally speaking; I don't suppose anyone really cares about the Jackson jokes. I've heard some funny ones, I haven't repeated any but to be honest, who cares? To a degree it has to be expected and I'm sure his family are all used to it by now.
Peace.