Vod, the levels that some persistent scammers will go to in order to achieve their goals makes the mind boggle. In many cases they will try to contact some members that have left feedback, I know this because I have been contacted in the past by several accounts (mostly with a sob story) asking for the trust/feedback to be revised.
There is also a possibility that the account has traded hands and the new buyer is the one that is trying to have the feedback removed in the hope it could be enrolled on a signature campaign one day.
Scammers probably have a calendar to track such things on their many alts.
