I am a non mormon in SC and I have a new set of neighbors who moved here from Arizona because the dad and college-age daughter play polo. I took the new neighbor Mrs. out to lunch and asked about her children - 2 adult sons back in Arizona, grads of ASU ( What? Not BYU?) By dessert I knew that she ( lunching Mrs. ) was an Osmond inspired teenage convert, her husband is Arizona BIC, and their two sons have left the church, married out of it. Now, my question is - are we supposed to call them ex- Latter-Day-Saints or ex-Mormons? ;)
No need to play along with Nelson's game of Simon Says.
Then if they want to correct you, they'll tell you what it is that they think they're supposed to be called (in terms of designating their religion of choice). It could be interesting. If they don't bother trying to correct the Mormon label, that will let you know that they're not fully roboticized Mormons and do some thinking for themselves.
Me: Hey, haven't seen you in ages! How are things going?
Him: Fine. Ended up with 10 kids and now I have 31 grandchildren and a couple of great-grandchildren.
Me: Wow, how cool is that!! Obviously, you're still doing the mormon thing!
Him: Well, no. I'm not a mormon. I'm a member of the church of Jesus Christ and a Latter-day Saint.
Me: Oh, yeah, that Conference thing. That's crazy! You and I grew up mormon and even if I dropped the religious part of it, I'm still a mormon, right? That's all I know! I'm a tribal mormon!
Him: Using the word mormon offends ghawd, and now that the prophet...
Me: Wait a second! If you were like me, you were masturbating to beat the band when we were in high school. Jesus survived all that offensive behavior, and that's got to be more annoying to him than then word mormon. Has Jesus gone all snowflake on us? I think what it is is that you've got a prophet with a stick up his ass.
Him: Nice talking to you, and go to hell !!
Me: I've got dinner reservations there with a really nice group of people. You'd hate us all!!