^ I agree the "omg ugly predator grill blarlalralr M4 da beeeeest because ///M power baby!!!" posts are not substantive and pretty useless, but it's pretty easy to gloss over those posts. They tend to be one or two lines long and no harm is really done IMO.
I think you should learn to take these posts in stride.
Personally, I have no allegiances to any car brand so I don't really care whether sub-group X (e.g. posters on bimmerpost) think car brand Y (e.g. Lexus) is ugly or whatever.
Go over to a Porsche or Ferrari forum and you'll find plenty of condescending posts about BMW.