Jazzy said:
In your eyes, if you encounter someone who can't spell (i.e. the difference between your, you're, their, there, or they're) do you automatically lose a little faith in their abilities?
Yes.
Beyond, of course, the occasional typo, and such like that way, repeated atrocious spelling and usage to where the meaning is lost, or you have to guess and work to figure out what they are trying to say, or, ask them to explain, just doesn't make for good communication.
Being on a forum is supposed to at least pass for fun, at least some of the time.
If we are struggling to try to decipher what you're saying, unless it is in a game thread or just random nonsense in a 'chatter' thread, then it ceases to be fun.
When I was working, I sometimes had to send a workorder back to an agency because whoever filled it out was, evidently, functionally illiterate, and I was not going to risk placing an order that could easily be for a high speed data circuit that would bill over a thousand dollars a month, based on 'my best guess' of what they were asking for.