Max,
You are correct that the garbage account is a public account with no team or personal score.
I have run this account in the past as well, you can see what's going on there with the following....
http://www.seventeenorbust.com/stats...mhtml?userID=5
As far as passwords and management I'm pretty sure thats taken care of by the project creators. Currently it doesn't look like there are that many that need expiring etc.