But some people are more open to being proven wrong. There are some who don't mind being challenged so long as at the end of the day they are smarter than they were at the beginning. It doesn't mean that they aren't skeptical, but rather that they are willing to consider the advice of those who have a very different mental model of things.

I think the writer offered excellent advice.

Now, as I said I don't know Stallman, so maybe he responds to 10 of these per month and is just sick of it. But even then, that's not a cool response IMO. If he has defended this before, point to a link or something.