This would be a lot stronger argument without the ad hominem bits. He's obviously not so terrible if he created this thing that has people so up in arms.
I think there's something to your post, but the tone makes me want to dismiss it. I know, stupid emotions.
This internet lynch mob mentality... I wonder how much this discourages people from releasing things. So, Gruber releases markdown.pl. People like it. People love it. People use it, people reuse it, people rewrite it. Next think you know, he's being insulted on the internet because he released something he wrote to serve his needs and not passing on some sort of figurative mantle or blessing.