I was called for jury duty 7-8 years ago.
Showed up, waited around for hours, everyone grumbling, until a huge group of us were finally called in.
Random guy was being charged with DUI, and some other offenses, walks out with his lawyer, does a half wave to the crowd. Judge then asked the court "is there anyone that has any objection to proceeding?"
I was the only one to raise my hand.
Judge calls me up to the front, the lawyers follow.
He asks me "what is your objection?"
I said I don't like drunk drivers and he looks guilty to me"

He excused me from the court. I've never been called back.