I really haven't seen this problem, I do though (sometimes) bust Jerrymac as living in an Underground Bunker with supplies to out live any atomic fallout - but he doesn't seem to mind, so thus I think it ok.
If you don't know the people in a forum, or haven't spent years here with many folks, you may not get the humor, that is very different and not the same as puning or punking anyone.
If someone went over-board, I would expect the person offended to request it stop, followed by an appology - ideally in private, but stuff happens. If something is meant to be harmful, then there is NO JOKE - that is a totally different beast.
We do indeed have a unique cast of charactors, many unique personalities and some are lighter hearted than some, but I really don't see too many post that reflect members, instead of just the people normally in a joke.