Amusing, but far-fetched. Gruber wouldn't weep on camera on a daily basis to emotionally hook the vulnerable. If anything, his style tends towards the dispassionate.
Regarding the article, I'm amazed that owning a twitter username today is made out to be almost as if he owned the domain. Is twitter that important?
Something tells me Glenn Beck's star power will help his new website quickly catapult to the top of search engine rankings.
Trademark law has classes for a reason. I'm sure Beck is perfectly within his limits to operate a company called Markdown that has nothing to do with Gruber's version. Also, why doesn't Gruber own Markdown.com? Seems like an obvious oversight.