Buzzfeed recently published a compilation of hilarious moments when old(er) people misuse the "Face with Tears of Joy" (π) emoji. According to wikipedia, π is the most commonly used emoji across all of the major social media websites such as Facebook, Snapchat, Twitter and Instagram.
However, just because π's used a lot, doesn't mean π's used properly. For many people over the age of 30, it's nothing more than just a normal old crying face, which makes for some great "old people of facebook" content. Below are a few of my personal favorites: