I mean if you're just learning the language, then it doesn't bother me. But if someone were to say to me "I ain't goin' no wheres!" it would seriously piss me off. I think this pet peeve started because the man who's been abusing me is 47 years old and still reads at a grade 3 level, his English is horrid. But to get to the point, IIN to get mad over such a small thing? Misspelled words, improper English, etc. It all annoys me.

I must admit that it pissed me off when the post is so badly written that it can't be understood but other than that I'm fine with it.
It's also common near me to silently pronounce the word "the" and replace it with a very subtle gesture like the tiniest nod of the head or the impression of a word being said, but with no actual sound. If I ask "Are you going down the pub?" people hear "Are you going down pub?" but in my mind I've said the "the", just non-verbally. And people with my accent have "heard" it that way too.