As was mentioned before, you can GENERALLY tell when someone is lazy, someone is young, someone is less educated and when someone just doesn't give a rat's arse about their grammar.
"Sounds like a fool" and being a fool are two totally different things. You can look back through any number of my posts and see that I have not called anyone a fool (well, maybe Pitchinkid and Burley), nor will I. Occasionally, I demonstrate the ability of biting my tongue for the exact purpose of not putting a kid out on front street.
Matt, be honest about the situation. The majority of the habitual offenders are MORE than old enough to know better.
When I take the time to type out a response longer than one sentence, I want the reader to see that I may have put some thought into a response. If someone were to respond to one of my questions and it looked like a first grade child typed it, how much credibility do you think I might give the post?
If anyone expects to be taken seriously in any given situation, they should present themselves that way.
Goofing around? Sure, type however you may like. I do it too on the less serious threads.