[discostu]

That's AFTER they buy the product. That's not the same thing. Sure when you own a licensed copyright to a CD you can modify it, but stores selling CDs don't own a licensed copyright to it, the license transfers straight from the primary copyright holder to the end buyer, those are the only two people that can modify it. Once you open the door to any seller or distributor being able to modify things without the primary holder's permission or even awareness you've just ended any useful concept of copyright.

[Hendrix]

"That's AFTER they buy the product. That's not the same thing. Sure when you own a licensed copyright to a CD you can modify it, but stores selling CDs don't own a licensed copyright to it, the license transfers straight from the primary copyright holder to the end buyer, those are the only two people that can modify it. Once you open the door to any seller or distributor being able to modify things without the primary holder's permission or even awareness you've just ended any useful concept of copyright."

It is not rocket science to have places that will modify your purchased DVD after you have bought it. In other words, I go into a shop buy the DVD and immediately hand it back to them for sanitation.