intertwingly

This is a trial balloon.  What I am trying to explore is what would happen if I were to convert the act of posting a comment into request/response interaction.  I would very much like to do this in a way that does not significantly inhibit the sponteneity that an comment system which does not require prior registration allows.

I also have a number of ideas relating to the insertion of tailored warnings on the preview page for conditions that can be easily detected.  These conditions could include: as postings to older blog entries, posts that are nearing the point of throttling, and the providing of URLs to pages which do not appear to be weblogs (missing autodiscovery tags or the like).

Such warnings could simply be informational - posts that violate these conditions could still be allowed.  However, I am considering have one or more of these conditions trigger some action (perhaps as simple as adding a checkbox) that would require some additional interaction on the user's part.  Such additions could even be variable or random.  Probing or otherwise getting this interaction wrong could also be factored into the throttling algorithm.