I definately wouldn't consider leet speak to be lazy or uneducated. Back in the day many hackers used leet speak to throw off search engines. It's usually harder and takes longer to write, and for most noobs, harder for them to understand.
I would consider common slips that have become 'cool' internet slang like "teh" as being lazy.
Ah well, looks like the 'feds' are catching onto our 13375|>34|<