I agree. I sometimes can't even understand what the poster means to convey. (And I don't mean folks whose first language is not English.) If any mention is made of poor spelling or incoherent, run-on sentences/paragraphs, the following responses are typical:
"Who made you the grammar police?"
"It's the internet. I don't have to spell correctly or use proper grammar."
"I'm typing on my phone. It makes mistakes."
The second one always makes me laugh. Either you can spell or you can't. Either you have a basic grasp of grammar or you don't. If you do possess those two fundamental traits, you'd have to go out of your way to speak or write incorrectly.