What other mess might this almost certainly ineffectual effort to cull comment spam be open to? Here are some thoughts off the top of my head:
- Cheating recips out of PR - rcjordan
- Cheating directory submissions
- PR funneling - this could be used to really skew websites as webmasters try to funel PR to certain pages an deny outgoing links PR - in fact, it could skew the web as it stands according to google if it got out of hand...
Anyone care to add some more or comment on the above?