So, I read a Cracked.com article about a certain popular video game (that shall remain nameless but involves going into blue things and emerging out of orange things). I knew nothing about that game before. (Why, yes, I do live under a rock.) I get curious and I visit that game's articles on Wikipedia and TVTropes. I watch some gameplay of it on YouTube.
Hours later, I open up Facebook and lo and behold, it saw fit to suggest I "like" that game's FB page. Even though I never typed its name on FB, and none of my FB friends have liked it.