(DWG here)
I am now reverting the broken data (which extended far beyond South America in some cases). There are currently over 400 user accounts involved and we have blocked most of them to keep them from further damaging the map. New broken data is coming in every few minutes, so clearly the “please stop” message has not yet propagated. We will continue to block all user accounts adding broken data and to revert the damage, but of course it would be better if that would not be necessary. Clearly it cannot be a good experience for a new user to receive an account block after their first edit.