you cant tell im a kid until i tell you.
The first time I read one of your posts I thought that you were 11-12...
I've used forums/online games w/ chat since when I was 12 years old... no one's ever called me out about being young... and except on one occasion, (cough) no ones ever cared when I pointed out the fact that I was a teenager.
This is mainly because my writing style has remained almost identical the entire time... I've always thought my posts through and used proper grammar, and spelling.
There's absolutely no excuse for writing a post with almost no capitalization, punctuation, or grammar that looks like someone vomited out a string of words that might make sense if you look at in just the right way. Most people realize this and will call you on it...
You'll find people who will say, 'Oh they're just kids, give them a break'- this is nonsense. You learn to form complete thoughts and express these in written language in elementary school. The ability to express yourself fluently and effectively through written language is important, especially now that so much communication is through text. The inability to do so will single you as juvenile or just stupid, and not without reason.
I've been posting a lot on international image boards recently and I'm disgusted with what I see Russians, Spaniards, Germans, Czechs, etc. posting in perfect fluent English compared to people I know who not only could not speak any other language that well (not to say I can either...

) but can't even articulate themselves in written English as well as people who speak it as a second language.