I think it comes down to you shouldn't treat your opinion as if it is the only valid one.
So, state "Twilight is garbage" all you want (though those be fightin' words in these here parts ), but don't say, "Of course Twilight is garbage! "
But your opinion is the only valid one for *you*. You can be respectful to someone and fervently believe that Twilight is garbage and nothing anyone else posts or says will change that opinion.
Poster A: I love Twilight, it's the best!
Poster B: Not for me, Twilight is garbage.
Poster A: Ah, well I love Twilight and nothing will change that.
Poster B: I think its' garbage and nothing will change that.
Each one's argument is entirely valid only for themselves and the other person's opinion really doesn't need to mean anything or factor in. I've never ever understood why someone else's personal opinion of something matters at *all* in how you form your own.
I love plenty of things other people don't, but if they intensely hate something or think its fluff, I'm secure enough in my opinion that it doesn't matter to me at all. Why on earth should the fact that Susie hates Twilight, have any bearing at all on my opinion of it? It seems pretty self-centered to immediately think someone else's opinion of something was directly formed or has some direct link to your own.
Why can't people just like what they like and dislike what they dislike and leave it at that?
It's easy to laugh it off or ignore it when it's that type of opinion. But because of what this board is, some of the most heated debates come when someone says:
-I did/saw/heard XYZ, what this rude?
-It would be rude, except for ABC exceptions, and since you can't know that, it's not rude.
-No, it's rude regardless.
-Could be rude, but family and friends won't care.
-Miss Manners says it's rude, so it's rude, period!
-Not if the person has Tourettes/social anxiety disorder/tunafish for lunch.
-Well, it doesn't bother me.
-Rude! Always has been, always will be!
All of those are opinions, and I even saw a thread recently where the prevailing opinion was that Miss Manners was out of touch, or speaking to a level of formality most of us don't encounter in our daily lives.
I love a good debate, but there does come a time when you're beating a dead horse. And thinking of all sorts of reasons that the person was rude if
-, is a bad as thinking of all sorts of reasons why rudeness should be excused.