What they need is something that will deprive them of their supposed moral superiority.
Since there is quite a lefty quotient left in the USA, going all tyrant wouldn’t do it and wouldn’t be Donald’s way anyhow.
To embarrass them by treating them like little kids might be the most viable way. Put videos of them on TV, accompanied by circus music. And surely much more.
I was joking, mate.
Now, in accord with your commentary, one could distribute pacifiers to the petulant hippies.
Would like to see the trucker comply with their request. No food or anything else delivered with in the beltway.