Hi. I thought this might be of interest here: http://www.rants.org/2013/06/09/privacy-promises-and-client-side-betrayal/
Thesis: Apps that promise self-destructing data, promise emails that can be un-sent, etc, are making promises they cannot keep -- at least not if they are to work with recipients who use open source software (but in principle they can't work reliably even in proprietary environments). We can't expect most users to follow these things at the level of detail we do -- so it's all the more important that we try hard to avoid making users promises that we can't keep. (I'm aware that "we" is a fuzzy term here and doesn't always include the people who most often make such promises... But we can call it when we see it, at least.) Best, Karl -- Too many emails? Unsubscribe, change to digest, or change password by emailing moderator at compa...@stanford.edu or changing your settings at https://mailman.stanford.edu/mailman/listinfo/liberationtech