Did we all do stupid stuff when we were younger: absolutely. Would I want the entire world to see what I did as a teenager and judge me for it? Absolutely not.
Which is EXACTLY why I personally think society should just not allow people under about the age of 25 to even be on social media in the first place. I know, I know, that will never happen because insert reason - but if we don't want everyone's actions to be recorded in perpetuity we should probably stop allowing them to post those actions in a forum that's open to the entire world and easily recorded. You can make laws until you're blue in the face, it's not going to stop an individual from saving whatever stupid thing you said or did and leaking it anonymously should the moment present itself.