Good Grammar Costs Nothing

I had to chuckle when I saw this tshirt online today (and being a self-confessed spelling and grammar nazi, I think I will probably have to fork out the dosh for my own).
Quoting from Glarkware:"...one thing is dishearteningly clear: the number of people in the world who can put together a coherent sentence is dropping by the day. Fortunately, we do have some recourse against grammatical offenses, short of justifiable homicide. Wear this shirt!"