Famous spoilers (spoiler alert)

Gus dies
Dumbledore dies
Old Yeller dies
The red fern grows where the dogs are buried (Editor's note: Not Old Yeller)
Ripley dies, but she comes back to life
Harry dies, but he comes back to life
Gandalf dies, but he comes back to life
Scott Pilgrim dies, but he has an extra life
J.R. was shot, but he isn't dead because it's all a dream
In the last episode, Tony Soprano
The island is some sort of interfaith metaphor
Rosebud is a sleigh
Soylent Green is people
The Matrix isn't real but Neo is really Jesus virtually
The killer is the guy who hired him to find out who the killer is, except then he isn't because she wasn't actually murdered ever
The extra becomes famous and then he doesn't like it and he realizes he's a jerk
The guy in the Crying Game is really a guy
Michael Bluth, um, I don't know where to start
Darth Vader is Luke Skywalker's father, and a little kid
Dexter is a serial killer and then a bunch of stuff happens and then he sleeps with his sister who was his wife in real life but they're divorced now
Not everyone loves Raymond
Google doesn't really know where you are. It's just a series of computers, not a person. It doesn't "know" anything. It simply possess data and the programming to serve this data to those who request it.
The 1% doesn't care where you camp