“Grinning Moon” and its negative effects?

I don’t know if this is the right subreddit for this, but I need a good discussion on this and you guys seem perfect.

My girlfriend and I have noticed that whenever there’s a waxing crescent moon that’s just beginning, negativity and hostility in people (especially customers) arises in the night at her workplace when she does her usual night shift. Customers at her store are more hostile than usual and are far more likely to cause trouble. Which makes every work night under a waxing crescent something to dread.

She dubs it the “Grinning Moon” because of how the crescent looks to be grinning almost maliciously, almost like an omen before that night’s disaster.

I want to make something to at least somewhat protect her from these awful energies, but I first need to somewhat understand (or at least have a clue for) what’s going on.

I was wondering what you all think of this and if anyone has theories of any type. Thank you!