the grammar gestapo

Nothing hurts more than finding out a comic enraged some internet Grammar Deacon. The worst offender for me personally has to be then/than usage. Is a silent correction the best policy? Or do you stick it out there and build a fort, arm yourself with cans of air dusters, and prepare for the onslaught? Perhaps I should memorialize each and every correction sent to me on a webpage of their own: "I draw good but these people have smarts."