And of course they do. They respect user choice and privacy. Whilst you can be all tin-foil hat and think they are going to keep these "cancelled" photos, I would seriously doubt it.
People also doubted that Facebook retained deleted profiles a number of years ago. Is this an unhealthy opinion to form in an age of growing "cloud" data?
Ha, I love the HN reaction to this. Sperging out about Instagram getting photos they're "not supposed to", fake outrage about fake privacy breaches, all while blatantly ignoring this fact.
And of course, I'm sure all this fake outrage has nothing to do with Instagram's recent purchase by Facebook.