Not sure how useful the old score will be going forward. In lieu of obvious scammer accounts being red tagged multiple times by multiple users, they are now likely to simply have multiple users supporting a flag on them, and end up with much less overall red trust, which will obviously massively impact their score.
Perhaps pre-flag scores would still be of some interest to someone. Or perhaps flags can be cunted as neg trust (actually I think flags do create sent feedback entry so maybe the same can be assumed on the receiving side).
Edit: Suchie beat me while I was typing. 
Told you those cookies are slowing you down.