While in my first game now with GS, I read several comments about rock band being "broken". However I've already found some ways to counter its power. Inquisitor. In 1 turn, Peter converted St.Petersburg back to his religion, after my band go there. Music censorship (policy card). Rock bands from other players may not enter your territory. Also, rock bands are not cheap, and the player needs luck. And, finally, there is a simple and fun mod, "To hell with the devil", that allows apostles and inquisitor to fight against them. I think rock bands are a good aspect of the game, strong, but not broken.