Si

There is literally no Forensic evidence left behind by an internet user.

An IP address is easily faked

And there is almost no other way to track and trace users and files.

Serial numbers can be generated

Scripts can be hacked

Your servers can be hacked

The list goes on........

The only way (this is just an observation not a soloution) That it can be stopped is for more detailed forensic evidence to be left behind by an internet user.

There isn't enough unique information left behind by people viewing or using any website for you to be able to pinpoint the criminal and for you to stop them.

Until there is, people will get away with content theft and file sharing.

That is all........