Internet Civility Solution: Paying to Comment

On the Internet civility front, here's an interesting concept. Tablet magazine online allows reader comments, but requires users to pay to comment:

It seems people can't even view the comments without paying.

I really like this solution, particularly for a large site with a lot of readers, although I also recognize that it could put some conversations out of reach for those who are unable to pay. 

ALSO: Imagine being the kind of person who would pay a fee to be an Internet Jerk?  Idea: maybe I should start charging a troll tax - if people want to come here and troll or harass, they have to pay for my time?

(Nah. Still not worth it).