I too find it funny, it's my kind of humour. I will get quite annoyed when I see improper grammar when it is a mistake, but I like making fun of those kind of mistakes with lolspeak. I also like the idea that there are many different types of language and my friends and I like to see how far we can take it and still understand each other, it's pretty funny sometimes.
Oh, and I do incorporate that type of language as well as Buffy and Firefly quotes into my daily speech, although certainly not in a paper or speaking to the dean or anything.