I lol all the time. But only in chat windows. I used to have something against lolling but I just couldn't help it when I started playing a certain nameless MMORPG. But I wouldn't go as far as to say lol instead of laughing and such. I know some people do that.

Edit: Teh is a typo. Well, that's how it started off for me. A strange typo against many other typos I made all the time. I think it was a trend some years ago, but I'm not sure.