Q has some fun in this chapter with appearances . . . a theme he will develop in greater detail later on.
We instinctively form opinions of others based on their outward appearance. What's your history with doing so? How has it helped you? Has it sometimes led you to be surprised . . . or embarassed . . . or relieved?
Snark and Margaret seem to go to great lengths not to appear "religious." Why would they do that? Do you think it's a good idea? What's gained and what's lost in doing so?