I have to admit that writing on this thread makes me a little nervous.
Hey, me too -- and I'm a card-carrying member of the grammar police!
Seriously, I don't ever think about it on a board like this. I figure anyone here is here to help solve problems bigger than grammar and spelling issues. I belong to another support board where one member types faster than she is able to, so half of the reading of her post is figuring out where one word ends and the next one starts... it's sort of like this exercises where words are all jumbled up and you're supposed to find the real word. And it's totally OK.
And with so many people typing on their phones these days, I think we've all become pretty good at getting around the mistakes.