I wonder how much engagement Google/Facebook/et. al. lose from people who are about to make a comment/post a status/etc., and then thing 'Hm, no - this is private now, but what about in a year when they automatically change my privacy settings without asking me?' Put another way, imagine I am a teenager or college student who uses Facebook. 1. Start to upload a photo from my phone of me and my friends doing shots 2.…
Just don't do this. Seriously. Don't do it. I don't know why people keep putting self-damaging things on the Internet. If it's on the Internet, you should consider it as public. Full stop. There's so many avenues for things to get out into the public (leaked passwords, website glitches, human error in general), that unless you're extremely careful about the dissemination of that information (hint: don't be /in/ the picture in the first place, or you've already lost), the data is as good as public.
Really, what did you gain by putting that picture on the Internet, anyway?