I am trying to fix a site that has had more than 10,000 spam user registrations. However, some legitimate user registrations have also been made, so I cannot simply delete all the accounts.
Manually sorting through all of this would take a very long time. However, it appears to be the case that no spam users made any comments or created any nodes. So, I thought I might be able to create a view that shows all the users that have not created content or made any comments, and then use VBO to delete all such users.
But, although I can make a view that shows users who have created content, I haven't been able to figure out a way that shows users who have not created any content/comments. How might I go about this?