There is quite a bit of flexibility that the author seems to have missed. But speaking as someone who has just recently tried Disqus on a major blog for work w

There is quite a bit of flexibility that the author seems to have missed. But speaking as someone who has just recently tried Disqus on a major blog for work where a number of the comments are anonymous, the simple fact that the button is ambiguous ("Login as...") did dramatically drop the number of comments. I suspect this is largely due to the fact that most visitors are one-time visitors, not regular users of our blog, but I don't have any data to back up that assumption yet.