Well, there's this...

...but honestly, I could see somebody sufficiently naive not recognizing that for what it is.

This one, however, is a bit less covert:

And then you recall reading this in the intro on the first page, and a pattern starts to develop:

My OBJECTIVE is JUST 4 KIDZ! The "Z" is for "ZEALOUSNESS," 'cause Jesus wants us to be hot for Him, not lukewarm.