I suspect a lot of the vitriol aimed at the book and its audience is less about either book or audience and more about the social conditioning and attitudes the book represents (plus a fair chunk of LDS-bashing under the mistaken impression we're all Mormons, because it's always open season on my religion). It strikes me as pretty similar to the hatred of female characters that's actually about how said characters represent the misogynistic, pro-patriarchal leanings of their creators, but the expression of the rejection of the message comes out as hatred of the character, which feeds into the misogynistic atmosphere that gave birth to such a character in the first place. A lot of people want teenage girls to have other choices, to have the awareness that the romance of Twilight is not a healthy one, to avoid abusive relationships. Unfortunately, the expression of this is shaming of young women's reading choices, which...only feeds into the social environment where a book with such an abusive relationship as the central romance would be so very popular, and upheld by a certain segment of the population as some kind of ideal to which young women should aspire.

The thing is, I was partially raised in the Mormon subculture, wherein the abusive, controlling Edward/Bella dynamic is presented as the only option to which a "good" young woman should aspire. I was lucky in that I had exposure to other cultures and knew it was propoganda. I'd like the girls reading Twilight to have that same awareness, and part of that awareness is often going to be shame or regret about enjoying the book at twelve. As long as that means a girl knows she doesn't have to marry the creepy kid who won't quit staring in gym class when she's seventeen, I'm okay with that.