strangers stalking your profiles
Comedian Jack Vale thought it would be funny to look for local check-ins, click on the social media profiles of the people that checked-in to learn more about them, then freak the ever living crap out of them by talking to them about the intimate details of their life they shared... without telling them how he knew said info.
And, he was correct. Watching people get completely creeped out is pretty darn funny, but it does bring up an important point. How much can a stranger really learn about you from your public social media activity?
Makes you think twice about what you share out there on the interwebs, all while entertaining you.