Sigh. The sad thing about incidents like this, is that they turn policemen into enemies. When you fear that the law is "out to get you" and humiliate you in public (handcuffs???) for minor infractions, you tend to avoid the law, and avoid cooperating with law enforcement officers, for fear you might "say the wrong thing" and end up in trouble.
The law is the law, but a little discretion makes the law work.
Like I tell my kids.......respect the police, but always remember, they are not your friends.