lukulus: I think problem with rating in BG games is not so big. Most of the cheaters are pawns so they will disapper in one month w/o finished game.
The people in question have been doing this for months, for example, one of the cheat accounts was created back in November. Pedro Martinez posted about it http://web.brainking.com/en/Board?bc=26&plla=942630 but they are still here and their game has got bigger with more accounts involved.
They've even, it appears, brought in established players, AcunaMattata, who are doing themselves a disservice by associating with these accounts, whether wittingly or not.