I think you're underestimating what service workers will do for a small amount of entertainment.

Being very subtly snide is a great way to pass the time.

Source: I used to refer to milk as cow's milk when working at a cafe, because very occasionally it would trigger someone, and I found that mildly amusing.

(Everyone else didn't bat an eye, because that's what it is).

Triggering snowflakes is pretty fun