Agreed – adding other users as project admins / managers then makes the project badge show up on that person’s observations, presumably which would be annoying to the observer and also contribute to the spam problem.
You can now only make someone an admin if they have joined a project, which should prevent the spam problem and the badge problem. Can I close this, or do you think a notification of some kind should be sent?
Unlike a traditional project, admins/owners of a collection project never have access to hidden coordinates, so no notification is sent to project members of a collection project if an admin or owner is changed.