Tell me is there a regulation that has been created that makes people to not use guns in criminal activities? Criminals do not respect the law, that is why they are criminals, there is no law that you can pass which will make people not use bitcoin for criminal activities, what you are saying is precisely why the governments can get away with passing all kind of intrusive laws because some think there is a magic law which can be created which makes everyone to behave and that is unrealistic.