Most people who are using Snapchat aren't all too informed about information technology (so they just assume everything is secure) and are fairly horny.
but that's not the point? it's not about it getting hacked or not
if you're using snapchat to send nudes, clearly, you don't actually want them to have your nudes. so you never should have sent them in the first place. what good is ten seconds of nudes gonna be to the recipient anyway?
besides that, there's not even anything you can do to stop them from screenshotting it. sure, it'll notify you, but then what? you can't do anything about it