Thanks for this Qaoz,
This is why being a grammar-nazi is never productive. There will always be someone else to correct the corrections you have made.
As far as internet posts go, its always best to just take the post for what it is and use problem solving skills to read through possible errors.
If you truly cared about the poster that you were replying to fjhlfdilju, then you would have sent that message via PM to the OP, instead of correcting him in public.