You can have Instagram delete that photo when you change your mind, but how about the friend who saw it and saved it, or the already-illegal bot that crawled th

You can have Instagram delete that photo when you change your mind, but how about the friend who saw it and saved it, or the already-illegal bot that crawled the site and archived it? "Changing the rules" can reduce data availability, probably well enough for most purposes, and that's good. But it's simply strictly true that once you publish something, you cannot assure it's unpublished. And everyone should know this and act that way.