I never did Facebook. Told everyone when it came out that stuff they posted on it would come back to haunt them decades later. I have no regrets about this decision.

80's and 90's: Don't put your real identity out on the internet / usenet / gopher, etc - you never know what some crazy person is gonna do with that info.

2000's: Post the color of your most recent poop and your most controversial political opinions out there for everyone under your own name. What could possibly go wrong?

Today: Predictable consequences of the retardation of the earlier decades. (eg. addition of normies to the internet)