These users are adults. The project is for recording species in a nature reserve, and the users are members of the park team (tourism office, I think). So the bad behavior is from the people in charge.
I understand this, but this sounds like pretty poor behavior. If you want to share some screenshots and examples with help@inaturalist.org I can take a look.
I can do so, though the problematic stuff is already deleted, apart from the agrees on one observation (which is not all that different from what many thousands of users regularly do).
My concern is that there is little that can be done to prevent repeated deletion of observations, so the users need to voluntarily change their behavior, and they are unlikely to do so if they feel antagonized. I’m not sure how to encourage a change of attitude without further provocation, though I suppose feedback from someone with more authority than me is probably more likely to be successful.
The tourism board? Geesh–it sounds like adolescent behavior. So sorry this is happening.
You can find their profile when you click on the number of people in the project next to the join/leave button and you will find the label of organizer or something like that next to their profile link. You have scroll as I remember but there might be even a search button for people maybe?
It may just be that the correct person hasn’t yet seen the observation, who can then pick out some detail and use that to further narrow the identification.
I’ve just gone through all observations in my local area recently, and come across observations from 2015, or earlier, that are marked as something broad like “plant” or “animal” or “angiosperm” and have been able to get them down to order, or family, or even species in some cases.
Deleting them utterly disables that possibility.