You don't have to log on through FB or Twitter to comment on HuffPo. You can have a separate HuffPo login in which you create a completely different handle.

HuffPo does keep track...now...of who comments on your comments in that Verizon box. I noticed they have something called "Stealth Mode." I don't know what that is.

I do, however, concur with David. Privacy is now a critical issue, and what it has destroyed, which the US Constitution provides for, is the right to be anonymous in your commentary. I can't recall the details but there was a famous case about 200 years ago with pamphleteers who published articles critical of the government and their anonymity was upheld as protected by the US Constitution.