I agree with you...its very annoying that people post sarcastic comments or post about wrong grammar/english.
Who cares if english is wrong? not everyone's first language is english
and if those people have nothing to post about except rude remarks and correcting english, then why do they even bother to waste their time and reply?
Its very very irritating.
Plus, we already have a Forum Rule about that:
12. Corrections. There is no need to point out another poster's spelling or grammatical errors unless you think it is causing confusion. Remember that not all members are native English speakers. Communication, not correctness, is our goal. Examples: Don't correct members who spell Mac in all caps or who call the iPod touch an iTouch.