Several years ago, I came home from a job interview and told my family I was pretty sure they’d make an offer.
My daughter posted it on Facebook. I told her that I had no idea how sophisticated the company was and if they’d do a social media search.
She didn’t believe me and of course her 15 year old mentality knew more than me. I forced her to remove it.
Turns out the company wasn’t all that sophisticated but they did hire me.
There are firms that specialize in searching social media, and a lot of companies contract out to them.