I haven't ever seen this topic discussed before, but if it has been, I apologize.
There are many threads I would like to respond in, but don't for the simple fact that there are one or two posters in them who apparently feel like they need to rebut every single other post that doesn't agree with them.
It seems to me that after someone has made their point, stated their opinion, and there is absolutely no doubt about what they think, they need to stop rebutting every post that doesn't line up with them.
I try to read through every thread before I post in it, but honestly? I just give up about half way through a lot of them because the same poster(s) come back time after time after time after time to say the same thing over and over, as if repeating it to infinity will magically make everyone else agree with them.
I think that this is rude behavior for an etiquette forum, but to give them the benefit of the doubt, I also (hope) think they just don't realize how they're coming across.
Maybe I'm wrong headed on this wrong. But I believe there comes a point where your point has been made, everyone's aware of it, so it's time to stop trying to persuade everyone else that you're right.