This is how we do.

Despite our nearly Brother/Sister relationship, me and Jo simply cannot discuss certain things civily. For instance, she can't even mention a combination of the words "Final Fantasy" and "13" without fire coming out of my ears, just as I can't bring up Dungeons and Dragons around Jo without her erupting into a font of rage over what 4th edition ultimately did to a ruleset she holds so very deep to her bosom, likewise she can't express her displeasure without me calling her an old fashioned, behindthetimes Ludite. Then Jade throws things at our heads and tells us to stop acting like children.

There is a small list, and it gets added to at least twice a year.