It’s midnight on the edge of Clapham Common in early September. The streets are eerily quiet as a shadowy figure in black shirt, shorts and baseball cap emerges from the common. He is wearing a red face mask, his features, except for some blond locks, hidden from view.
As is covered in the article, explaining the environmental impact of SUVs to SUV owners does not change their mind or encourage them to get a different car; it is effectively ignored.
So that is where ideas like the deflators come in, you make it more inconvenient, maybe that will work where polite discussion did not.