Personally I'm not a fan of DUI checkpoints to be honest.
I don't like any of the fascist crap... Sure... I understand the argument, but if we decide to be fascist over one thing over another, where does it stop?
Eventually, you're just stopping everyone all of the time.
It's crap.
That said, he could have just rolled his window down... What the fuck harm is that? It's not like he was afraid for his life or anything, the kid was just being a dick.