I think I did mention that in the piece, but I deliberately keep the Facebook comments even on articles where I'm critical of Facebook to show that I'm not some extremist zealot. I'm just a normal person who happens to love the web.
Why use Facebook comments, though? I thought what you wrote here was great, but the choice of commenting system seems to conflict with the (excellent) points you're making.
Using a built-in commenting system like that of WordPress would be much more in line with The Web That Was. Those types of comment systems are still common, so using them would hardly make you a zealot.
Until I came here, I didn't realize your blog had a comments section, because I block Facebook comments with Ghostery. Not worth it to me as a privacy-vs-content tradeoff. I do allow Disqus, which identifies me by email and is therefore much more in the spirit of services like Technorati.
The problem is that you don't allow using normal commenting options (with Open ID or Persona) in addition to Facebook (if you need that one). So why can't it be called extreme? It's rather irritating to see sites requiring to have Facebook to comment (I don't use it). OpenID and Persona are the most flexible options.