The problem with TSA keys is that they are all the same, can easily be cloned, and couldn't be rotated.

It is possible to design a system where judges have their own hardware keys. Hardware keys can not be cloned assuming strong tamper protection. If a hardware key gets stolen it can be revoked as being valid and a judge can be issued a new one.

DRM is different because the client ultimately has to have the keys to decrypt the content they have been permitted access to.