:::::::The way I'm getting around this subjectivity is to score links based on the Google link:www.postcastsitename.foo score; I put this score next to the link and the date for the score.  Sites with a link score of zero are deleted on the spot (I deleted two such sites).  I also delete sites that sell commercial software.  My heuristic is a little fuzzy, but I'm far less inclined to delete a link that is itself a list of podcast indexes a.k.a. http://www.podcast411.com/page2.html. 
 :::::::Basically, what I'm trying to remove is links being added by the spammers promoting their own Podcast search engine or podcast writing software (I deleted that link also).  I think the Google link: score is a good Heuristic, as is adding lots of bonus points for adding links to other podcasting search engines, the way podcast411 does (the bonus only counts if the link here on Wiki directly links to the list in question).  Wiki's job is to point to information already decided to be notable, not try and make non-notable information notable (this is also why I would like to see 99% of the micronation article thrown out)