How does account clean up work?

I saw Reider's post in that account deletion post. I was wondering, how does the clean up work? Is it done manually or does the system pick up inactive people and delete them?

It has to be triggered manually but the system will clean up old accounts automatically.

I see..Even inactive Premium members?

No. There are very specific rules for who gets deleted and who doesn't. Premium members do not, anything that would cause disorder in the database by removing permanent data do not.Edit: Also just noticed Reider said 14 days. This is how long you can be inactive and still get points. You have to be inactive for far longer before we'll delete.

I see. Thanks for the info.