It is important to write all posts in the same way that you would write a school paper, and not in text message style. Use proper capitalization, do not omit words. It is better for 2 reasons: because that helps non natives learn more and prepare for their tests, and it also avoids confusion as to whether you are being truthful.
One of the first things SuKi told me was that I should "maybe learn my own language", when in fact she had made a big mistake that could easily be proven.
However SuKi is correct that lying about nativeness and language proficiency is a HUGE problem on this site, but you should also prepare yourself, you will find there is also a lot of anti-Americanism here, and people say many thing about the US and US English that aren't true. There are also many fundamental misunderstandings about the nature and purpose of grammar.