"To pee or Not to pee"

I was delivering something to one of my neighbors this week and noticed that their porch was littered with moth balls. The smell was quite obvious and smacks you in the face when you step on the porch. There were moth balls to the left of me, moth balls to the right of me and moth balls in front of me as into the shade of the porch I stepped (lines lifted from Tennyson's "Charge of the Light Brigade" in case they sound familiar.)

Turns out that they are supposed to keep the stray cats from pee-ing on their porch. I don't know which smell is worse......