I'm not sure about on this forum, but certainly on other forums, I've seen this manifest not so much out of a desire to have everyone agree with the poster, but rather that they don't think the others understand what they're saying. If they got the angle, but disagreed, that's ok. But its really frustrating when you can see that people just aren't getting what you're saying.
I think that happends frequently.
I also use the mental "ignore" button. It's even more handy than a real ignore button, sometimes.
It seems like most of these wouldn't be quite such an issue if people were more careful to say, IME, IMO, etc. It's the sweeping proculation that "My opinion is the correct one" that gets people's hackles up, IME
Well...if I'm saying something that's obviously a matter of opinion rather than fact, it's pretty clearly implied that what I'm saying is my opinion. If it weren't, I wouldn't be saying it.
You would think so, wouldn't you? Try expressing your opinion by saying "Twilight is garbage," or "Sex and the City is stupid," or even "Onions are tasty," and see how that works out.
One of those in particular sparked a whole debate about exactly that; it got so out of hand it was locked. People couldn't accept that some statements are opinions no matter if you say, "I think..." or "IMO" or not.
...and then come back and beat it like a dead horse.