30 years from now, candidates for president of the United States will have their old social media posts under a microscope. Whatever dumb thing they posted in their teens will be brought to light.
It's probably going to raise a lot of discussions about what constitutes normal human behavior. We might finally stop pretending they are perfect humans.
After realizing that everyone, even future politicians post stupid things, We probably will stop caring about online privacy.
It might also be a bad thing because society would expect oversharing as the norm and would consider anyone who doesn't put their private lives on display, to be hiding something.
Either way social media is here to stay. But it will change, this is version 1.