> time-based deletion of messages? That is on their public roadmap, How can deletion of a sent message be enforced? I realize that some messaging services offe

> time-based deletion of messages? That is on their public roadmap, How can deletion of a sent message be enforced? I realize that some messaging services offer this feature, but aren't they all misleading at best? Even on a centralized service with a trustworthy admin, the recipient can always copy/paste or take a screen shot.