Does anyone remember the episode of TNG titled "The Game", where Riker brings back this virtual game device, that everyone started playing. It wasn't until nearly the whole crew of the Enterprise was absolutely addicted to it that the ever-annoying Wesley Crusher and his partner in crime determined that it was actually a mind-control device sent by a group of rogue aliens with the intent of infiltrating and taking over the ship. Their very existence was threatened by this all-consuming game that would allow the evil bad guys to swoop in and capture them all for eternity.
Ladies and gentlemen... I give you Farmville.