Actually, it takes longer to decipher if you write in text. People are talking about the death of the english language when they know quite well that they do not type properly, and example being a lot is two words and for God's sake use capital I's.
This is exactly like the grammar post.
I do typos a lot, but I know that I can spell it. I don't bother to correct myself because thye know what I mean, but doing it just on purpose is pure laziness.
You are not being graded, no, but you're leading the impression that you're an idiot on the forum.