This is one of the reasons for the new silencers, both in Sweden and Great Britain, the sport is at threat of closure, due to the noise levels. Just because Poland/Polish authorities deem them not needed, doesn't mean the rest of the world will follow. If the PZM now ban Polish riders from riding in meetings that use the new silencers, then will this have some riders turning their back on the PZM, so they can ride in the GP's??