I've seen alot of these conversations where someone says something negative about ST09 or JJAbrams and they get bashed for it.
Typically, though, it's not because something negative was said, but, rather it's when someone even mentions JJAbrams, and it results in a Bashing of JJ, calling him Jar Jar and railing on and on about what a greedy Hollywood whore he is, and how he F'ed up Trek, and everything he's ever put out is compelte trash.... and often times, that tangent has nothing whatsoever to do with the conversation where JJ was mentioned. Likewise with the film itself, you can say something bad about it without a problem, but, when you drone on and on, at the mere mention of the movie, in a totally unrelated rant, just because the movie was mentioned, then, yea, it gets blowback.
Now, I won't say, there's never been an attack on someone who brought forth a complaint in a civil manner, and I agree that's totally wrong for Posters to do, but, typically, it's because of the unnecessary unrelated endless tired rant that comes out of nowhere for no reason, other than to bash. I've never seen a post that said "I loved the new movie, but...JAR JAR...F'ed Up...Greedy...raped my childhood...", but, obviously the "I loved the new movie" part was completely disingenuous in this example.