It's annoying. Not only does it make you look like an illiterate douchebag, but it's actually more difficult to read than if you would take the extra .4 seconds per post to type like a 4th or 5th grader would.
I'd also like to introduce to the letter g and of course, the period.
Ando - Period. Period - Ando. There... now can we please all just get along?
As for you not making bad posts, I suspect your Red rep isn't for your grammar...