Actual missionaries? It sounded too good to be true. Four days later, my phone rang. It was Elder Guthrie—he and Elder Leatham would arrive around 6:00 p.m. And at 6:11, there they fucking were. I shook their hands and pointed them to the couch.

via The Missionaries’ Position – Books – The Stranger, Seattle’s Only Newspaper.

I’m not sure this is the best way, but it could certainly be the most entertaining.  You have to have the intestinal fortitude to sit in the same room with two Mormon missionaries and make them feel about as uncomfortable as you can.  Of course, as the article points out, it helps to be gay, but it could be fun just to take them to task on all their silly beliefs.  Or at least have a laugh-fest reading the B of M (or simply BM) aloud, which is about the worst written pile of scriptural dung you might find.