@Humpleupagus You don't seem to have actually read the facts of the case.

It isn't a copyright complaint - it's a DMCA complaint about circumvention of digital handcuffs.

If the circumvention claim is awarded, it may result it being illegal to possess or distribute such "circumventing" software, without any copyright getting invalidated or becoming unenforceable (yes, the DMCA is that bad) as in other jurisdictions, the license is still entirely valid.

It would still technically be possible to enforce a GPLv3 infringement case even the banned jurisdiction, as that infringement would only be doubly illegal.