A scene from "The Wire.” (Paul Schiraldi/Courtesy HBO)

College Humor recruited actors from “The Wire,” “Dexter,” “True Blood,” “Heroes,” “Battlestar Galactica”and “The Walking Dead” to lay down some much needed ground rules for spoiler etiquette, including conversation pointers and term limits.

(Yes, I do believe this video was timed to coincide with Sunday’s “Walking Dead” episode, where [spoiler] [spoiled.])

Sample rules include only talking about spoilers in Mandarin. Sarah Wayne Callies (a.k.a Lori Grimes) tells us that if a friend doesn’t follow the rules and spoils an episode of a show, we can exact a revenge spoiler. If only one could seek revenge on a photo gallery.

Watch the video, which contains on NSFW language at the 2:01 mark, to learn the basic rules.