Some things are fair game, no questions asked: Scouts/deacons, elders quorums, dating, church basketball, and most missionary stuff involving food.
Other things are a definite no-no. For example, references to most ordinances are taboo -- with the exception of baptism. For example, a gag about the high school quarterback passing the sacrament might be finny, but would probably cross that line of good taste.
So I wasn't entirely sure about this one. Yes, we're all about teaching children how to discern the promptings of the Spirit. But is this nudging that line?
I guess I shouldn't worry -- there are other gags that will be much more likely to get me into more trouble than this one!