There's a difference between walking on eggshells and being an out and out ass that most people don't get.

* If you want to talk about it to a group ask

* If already in a group talking about the movie then you're not responsible if someone overhears spoilers, but if someone joins mid conversation you should probably warn them so they can walk away

* Asking someone if they've seen the movie and then directly proceeding to spoil it to them when they said the haven't yet is being an ass

* Standing outside the theatre yelling "I hope you enjoy [spoiler]!" as people enter to see the movie is being a super ass. (Happened to me on Friday)

You may not be an ass but don't pretend that there aren't people out there who are using it to be an ass.