i.e.
http://www.imdb.com/title/tt0431197/board/nest/87126679?p=3 When you decide to flame other people for making trivial spelling and grammar mistakes and then go on to make PLENTY of your own only to defend it as a typo, you fail and make a complete fool of yourself.
I have no idea how many times I've seen people fuck up at trying to point out others' mistakes when they do the same. We're all hypocrites, but you could save us a bit of time by not opening your mouth so often if you're going to be so obvious about it.
The best I've personally dealt with was when some asshole on IRC decided there was nothing to flame me for other than my usual informal typing - no caps, minimal punctuation, wandering all over the place - because IRC isn't English class. He proceeded to tell me to capitalize words correctly. I found that really funny coming from someone who couldn't even spell out the word "you" and instead used "u" while trying to tell me to do so.