In your average fascist dictatorship, you're absolutely right - subject closed, you're on your way to the Gulag.
In a democracy, you'd think that citizens should be treated better. Had this particular cop spoken to that young man (which is what he is, not a "punk" - you must have issues with younger men..) and calmly and professionally explained that he would be subject to arrest if he didn't sign - and even better, included the basis for the charges as the young guy asked, he wouldn't have had to Tase anybody.
But I suspect that cop was itching to try that thing out anyway. He should be ashamed of himself and so should the state of Utah.
If all you can see is a country loaded with punks that must read signs or else, you really don't enjoy life much, do you?
You need to reread your Constitution. The United States is not, never has been, and never was intended to be a democracy. We are a Consitutional or democratic republic....i.e. a nation of laws. Once the driver refused to sign the ticket, he no longer had a bond for his release to appear in court. Without a bond, you go to jail.
Thank you for your service to this nation.