How to keep a parking space clear

I’m about to run out the door, but I just gotta share this….
It is Sunday morning and people going to one of several houses of worship are parking in on my street. There is a woman, walking down my street, screaming and yelling and carrying on, so I’m just going to label her crazy. She’s yelling at no one, but when someone does appear on the street she starts loudly hurling insults that don’t make sense. Anyway, she stopped just in front of my house, where there was a parking space. I looked out of the window and saw a car stopped near an empty space but seeing her right there yelling at them, they drove away.