#17297: TorCheck fails on new exit egress IP not in exit DB, confusing to user https://trac.torproject.org/projects/tor/ticket/17297
As said three days ago before OP...
No, I'd consider it a technique to avoid having your exit put on braindead tor-hating consensus scraping blacklists... a feature not a bug... with the great side effect that such exits are usable to circumvent similar braindead / hating censorship directed at tor users. (Thus exit operators my explicitly want to set this up and could care less what check.tpo and whatever else say, or don't say, about their IP.)
Exonerator is for operators, that's their choice there.
I'd rather add a blurb on check.tpo to hit newnym and check again if user has reason to believe they're using tor than start booting relays because of this. (Or "fixing" exit DB / check.tpo by scanning).
Also, it's routing / tunnelling / bind addressing and has nothing to do with exit policy.
If "glaring unhappy RED spits" scare people just tell them to hit "new identity", restart TBB, etc until some threshold of "bah, it's not going away" happens.