"The issue of correctness didn't bother him," says Ms. Paster. "He loved to play with language." As for leet, "He would say, 'Bring it on,' absolutely."
Alright, so maybe it's not exactly breaking news, and Shakespeare didn't actually say it, but but for a few trifling centuries he would have. And that's what counts. Go read about the evolution of leetspeak and how Shakespeare would have loved it here.
(Hat-tip: Language Log)