While when you don't have the possibility to trace which IP belongs to whom later on.
You still can opt for an option that a ISP session can be while established frozen upon a request form the police.
So to say, while you grant anyone teh anonymity to so to say run the strats with a mask, once you see some one right now doing some "real bad shit" you can grab him and tear down his mask.
The point with that is that you can not never ever do this to enforce stuff against many people, as the logistical tresholds must be selected so high that it simple always will be infeasible to apply on a mas scale.
Than everyone who is not doing "real bad shit" is effectively anonymous.
Of cause even with such a law there could be foreign VPN's that does nto follow such requests, but if they cant monetize the filesharing masses, just a few perverts they wont be a viable busyness model.
Copyright enforcement is the single worst thing that happened to the prosecution of CP spreaders ever.
This post has been edited by DavidXanatos: 12 February 2012 - 01:05 PM