You are absolutely right, I've had debates with drunks before, and not only do they make gramatical errors but they are more prone to violent outbursts when their arguments are shot down. A good idea for anyone who plans to debate about weeds good points is try to be sober for the debate, save the bong-load for after you've reduced the competition to a red-face stammering asshole who can't think up anymore defenses for their misinformed set of beleifs.
I'd like to know where you saw those posts so I can join in all the fun.