I've done it, it's not that difficult to bump them down to moderate, the trick is to keep them there, I had 20 APs on guys then the SIM goes up for one cycle and the kid signs. When the sim goes up I assume they are using APS not HVs, because I have bumped them down by going from 20 to 80 APs in a cycle. So I am working on finding the amount of APs that will keep them from jumping up, it is more than 20 and less than 80 is all I can say right now.
I have been burned multiple times and 2 times recently where I lost a 4 star and a 2 star in back to back cycles. The last day of 1st period.