Case 1: Your assertion is correct. The system works as intended and bans decrease. Case 2: Your assertion is incorrect. There is some other reason for making a

Case 1: Your assertion is correct. The system works as intended and bans decrease. Case 2: Your assertion is incorrect. There is some other reason for making a throwaway (like talking about a former employer, for example) and the system works as intended. The throwaway doesn't get banned and nobody gets their account demoted. Also these demotions could have a time element to them, where you can't invite someone new for, say, a year.