I vote for opt-out.
This is a 3rd party tool managed by a small team of select individuals, so those that want to be isolated hermits can easily be added to a blacklist of deeds to deny being added to the map.
The average player may only be on 3 hours a week, on Fo knows which time zone. That makes it difficult to get approval from a mayor who may be on less than 2% of the time. And what would they notice if people dropped by, anyways? They aren't there to be bothered.
I think if we do decide to switch to opt-out, we should have a period where hermits can have their deeds added to the Yaga teams' blacklist so they never get added without consent.
Plus this would greatly counter the argument "butT THeRe's NOwHerE 2 deEd!"