Katz no haf opposabal tumbs cant has tiping proprly. Hoomans talk funy to.
(i.e. They post like the captioned cat images which were originally badly written for humour and because cats wouldn't have the opposable thumbs or linguistic skills to communicate properly. I love funny pet pictures so I look at blogs like this but as an English geek I can't stand reading any text at all.)
Actually, I'm pretty sure there's a filter on the site that turns any normal text into "LOLtext." There was a comment from some guy in Germany who didn't understand the jokes, and even his text was like that. So I'm pretty sure it's a filter.