Do you need to see The Twilight Saga: Breaking Dawn to know if you will like it or not?
You need to know the gist of the books or at least see one of the movies. Most people just want to jump on the bandwagon and hate on the new thing the internet is hating on. Twilight, Bieber...hell, it even gets political. No one thinks logically and says "hmm, I should see what it's about to really pas judgement."
With that being said, I probably would be hypocritical and not watch a movie called "Gay Black Cocks in Horse Assholes Part 2" but that's because the title gives it away. What about the "Twilight" title gives anything away?
I'm just using the same logic we use for everything else. Because having a stance against marijuana without trying it is frowned upon, right? Why is it different for Twilight? Or Justin Bieber? I, personally, have actually never listened to a Bieber song and knew it. I was listening to the radio at home, a song came on, I asked my sister who it was by and coincidentally it was a Bieber song. I didn't think much of it. I didn't feel like shooting myself, like many on the internet exaggerate about.
So I take these with a grain of salt. Watch the shows for yourselves and then pass judgement.