None of these arguments pose a significant problem. While setting criteria may be difficult and there will always be cases where it is a matter of interpretation this is not a reason not to create a strict and detailed set of criteria. There could be an appeals process to make sure that a song is not banned based purely on one individual's opinion.  That a ban on recording and selling the music could be avoided through pirating or songs being passed down orally does not matter as if this was happening the ban would already have enough of an impact. The ban does not have to be totally comprehensive in order to have the desired effect of reducing violence towards women simply that it prevents many people listening to the music. The audience would be reduced to a tiny minority and those who remain would be aware of the lyrics as they would have to specifically seek out the music rather than simply being exposed to it with little thought of what it may contain.  Finally there is unlikely to be a large forbidden fruit effect, some people may want to try it in order to find out what it is like. But unlike for example drugs there are direct substitutes that would be almost exactly the same but without the violent lyrics so there is little point in going to the extra effort to get illegal versions.