Is there a track of how many of a user's post have been deleted / removed? There should ideally be a track for users who post repetitively to bump threads, even if those posts are removed.
I believe admins can only see deleted posts, although moderators may have access to the number of posts that have been deleted via a report. Although, if you are reporting an account note down it's name and archive their post history at the time of the report. If you come across them again then report and include the archive. The staff can then decide it's fate.
I've started doing this for full time members and above as the other ranks are easy to achieve and would likely result in a waste of time.
You do not have to do this manually. Vod's
site has a list of posts deleted by moderators (from modlog) at least for the past few months. If the staff can view this while handling reported posts, it will make their life a lot easier.