It's disappointing that the article doesn't lead with this limitation. We (and everybody who's used Snapchat) know that self-deleting messages aren't truly poss

It's disappointing that the article doesn't lead with this limitation. We (and everybody who's used Snapchat) know that self-deleting messages aren't truly possible, but there's no reason everybody should. This is definitely a useful feature to manage sensitive documents within organisations where good faith (but not necessarily diligent policy adherence) can be assumed, but it's pitched dangerously wrong as you say.