Anti-Splog Use Question

I have been busy and not been able to watch my WPMU/BP site but that's OK cause Anti-Splog was doing it for me. Awesome! Caught a ton of splogs and moved them into recents splogs.

I have a 2 part question...

1) My first question has to do with user accounts that these splogs create. I am going through and marking the 100's of accounts as "Spammers"... what should I do with them? Mark them as "Spammers" then delete them? Or should I just delete them? Does Anti-Splog do anything with the user accounts?

2) How long should the "Splogs" be left in the "Recent Splogs" silo before deleting them?

Thanks in advance!