[spyspy]

It's actually easier than you'd think. A friend and his high school buddies decided to prank one of their friends by all writing on his all saying how sorry they were to hear about his dad, he was a great man, RIP, etc. Other people saw those and jumped on the bandwagon, writing their own condolences. It was a sick but very successful prank.

[nommm-nommm]

For a morbid prank I always thought it would be "funny" to put a dead man's switch on my facebook account so that if I died I'd start posting again after a few months.

It's only funny in the abstract though, I wouldn't want to hurt friends/family in real life.

[sqeaky]

My friends and family expect jerkface but technically nuanced shenanigans from me. If I didn't start posting on the Facebook and twitter after I died my friends and family might think I faked it.