Now I'm going to have to read all your posts for misspellings!
I used to be very adamant about my own posts - to this day I nearly (but not always) preview my posts for correct spelling and (what I think is) correct grammar, but in the last couple of years, I think my brain has stopped working because I'll see something of mine quoted...and there's a mistake.
I'm pretty forgiving with other people, just not with myself. I had an English creative writing professor (in both senses of the word English), and you'd have thought he'd have been a stickler for such things...nope. His philosophy was, "If I understand what you're trying to communicate, then you've done your job getting your message across to me."