I think what bugs me the most about these challenges is the fact that they are community moderated. I feel like the moderators place a HUGE amount of value in caches because they follow up with owners as soon as a cache is marked as needing maintenance. Unless Groundspeak plans to get involved immediately when a challenge is flagged in inappropriate, I think we're going to end up wasting a lot of time chasing pointless challenges.
In general, my favorite caches are the ones worth driving, hiking, etc. to even if I'm going to DNF it (especially since the likelihood of a DNF for Ben and me is pretty high, LOL). I worry that without an actual moderator keeping track of these things it will be hard to have any confidence in whether or not a challenge fits that category.