I agree with your points, BlueDev.
Unfortunately, some people think just because they say they are only joking, means we are not suppose to take offence. I think they need a clue.
And I can't stand people who insist that they are funny when they are not. "I was joking, you just have no sense of humor." (Another phrase that makes me want to smack the speaker up jaw...) And guess what, just because a few morons laugh along with you doesn't mean I should find you funny too.
>>That can be difficult on the net. We only have verbal reactions to go by. But a careful author/speaker can still gain enough understanding to know where limits are, and how best to work within them
Reading a thread wrong, and responding in inappropriate manner - I've been guilty of that.
Once I was kidding around in a thread meant to be serious and I got grated for it, the only thing to do is to apologise for one's lack of sensitivity.