"I don't speak netspeak."

This is how I usually reply to people or comment upon posts that are littered with phrases like: Hi!1!!!11 How R U? NE 1 here?

Personally, I like it when I can easily read something. If a word or two is mispelled, or a comma/period is missing, I can gloss over it and be okay. It's when it's extensive that it gets on my nerves.