[mr_toad]

Blu ray discs can only (legally) be played in licensed devices, and some of the decryption keys can and have been revoked.

[zephen]

Key revocation only affects future disc releases.

[microgpt]

AIUI every disc is mastered with the latest revocation list. When your device sees that it is revoked by any disc, it bricks itself.

[zephen]

> When your device sees that it is revoked by any disc, it bricks itself.

Do you have a citation for that? I don't believe it, partly because I can imagine the sort of class action it would engender.

There are reports of bricked players on the internet, and unbricking, but those mostly seem to have been caused by bad firmware updates.

The wikipedia page on AACS only mentions revocations affecting future content.

https://en.wikipedia.org/wiki/Advanced_Access_Content_System