>Any open source solution would be trivial to disable, by definition. Hence OP's point that pursuing this to its logical conclusion means banning F/OSS.
And you think that you can't "mod" some proprietary application? The only exception is locked down devices so not only FOSS would be affected but also non locked-down and DRM devices, if UK or Australia will demand only DRM devices to exist so all laws are followed then we are fucked anyway.