I woke up this morning to find that I suffered massive drop in points across network because of lots of users were removed . What happened to those users? Was there a database cleanup?

Currently, when a moderator deletes a user all of the user's votes are removed along with the user themselves. I was pretty surprised at this behaviour when I first heard about it, and I don't think it is a good idea to throw away all of the votes just because the user is deleted. Votes are lock...