I don't have time to get into it every time that guy's name comes up.

Basically he's best known for:

* Jargon file

* Parading himself around as "Mr open source" in the late 90s

* Working on what by all accounts was a not very good mail client a long time ago

That's the "good" side that's supposed to give him credibility as an expert, and it's not very much. The negative stuff is pretty bad.