Everything and everyone in this movie is extreme!
Their actions are extreme. Their motivations are extreme. Their reactions are extreme.
Don't like some billboards? Burn then down!
Don't like some police stations? Burn them down!
Don't like some mean students? Kick their crotches!
Don't like black people? Torture them (but don't get caught!)
Don't like white people? Throw them out of the window!
Don't like getting cancer? Blow your head off!
Don't like some souvenirs? Throw them to the cashier! And tell her you might be her daughter's rapist! And not paying the $7!
So extreme!