The workaround is to make the canary automatically lapse frequently unless renewed. Precedent in the past regarding library books provides that you can't be com

The workaround is to make the canary automatically lapse frequently unless renewed. Precedent in the past regarding library books provides that you can't be compelled to do something by a gag order that qualifies as speech, and updating a canary daily with a statement like "As of {current_date} we know of no warrants that have been issued for {private_content}" probably qualifies. Have a static page, update the date value daily so long as it's true, stop updating it when it becomes false. Based on the library book precedent I think this would hold up.