Sounds to me that they need a formal warning and should be suspended if that activity continues after the warning. Please send me a private message with more information/links. Thank you!
As far as not getting notifications about changes to the DQA, that’s been suggested for change and hopefully will be included in the upcoming notifications revamp: https://forum.inaturalist.org/t/notifications-on-inaturalist-please-share-your-ideas/374 Further discussion of notifications will be moved to that topic.