Need to be able to flag users

We are getting more and more spam users that either just test the app and send lots of duplicates or challenge the system. Either way we need to be able to set a flag on new users such as "SPAM", "ABUSE", "GREAT NEW PLANTER" and other values TBD. For that the planter table needs to have an additional field which could be "flag" storing these values ideally from another table. Additionally we need a rating system that could be the field "rating" which we need to incorporate into the admin panel. Flagged users images should not come up for review and basically be dealt with separately in queue.