Why do people care soo much about your grammar?

Question

God atleast answer the question who cares if ppl use slang, or internet abreviations. You look ignorant when all you do is say go back to school.

Answer 1

You have to remember some people have to prove themselves as better than others, so even if someone else answers a question correct, the hater has to point out the flaws.

Answer 2

I disagree. Using internet slang and text talk, particularly in the wrong setting, makes a person sound illiterate and uneducated.