the flip side (of something)
1. The opposite aspect, possibility, or result associated with something. Of course, the flip side of integrating technology into so many aspects of our lives is that we run the risk of exposing our private information to cyber criminals. I'll have to work really long hours and be away from my family for long stretches of time, but, on the flip side, I'll get the opportunity to travel around the world.
2. The side of a record that is not currently playing. What's the flip side of that song you have on?
the flip side of something
The flip side of something is its opposite, usually negative, effect. Perhaps the flip side of maintaining that privacy is that you don't show yourself the way you really are.