I agree that these forums, like most, are pretty informal. And that content is the important consideration. At least in theory, anyone who has read more than 4 threads here (or elsewhere) knows that content is, um.... sometimes hard to find...
However, I do wish that more people put more effort into writing 'proper like'. It is not that one can't generally get the meaning of the sentence despite the wrong use of their/there/they're and then/than and your/you're, etc. etc. It is just that because I do know the difference, when I read a post where it is used incorrectly I have to stop and reread the sentence to figure out what the poster
meant to say.
Because the writer is spending less time on their writing, I have to spend more time deciphering their intentions. A error or two is one thing, but some posts are so riddled with mistakes that I won't read them. It's just too much work. And if they were asking for help, that is one less person who might have had an answer reading their request.
So go ahead and be lazy with your writing, but then don't complain if you're not getting answers to your questions.
Of course, any post that starts with an apology about their english because it's not their first language is different. It doesn't matter how bad their english is, it is better than any 2nd language I could muster.
Just my 2 cent rant.