I'm not actually sure what I am suggesting to be honest. I just had these little voices in the back of my head saying to finish researching the various identif

I'm not actually sure what I am suggesting to be honest. I just had these little voices in the back of my head saying to finish researching the various identifiers used by DRM. And I think you are right, if such things were used then people might have to prove they moved and it would be a PITA for everyone involved.