I've been called twice, excused once. The second time I sat on jury for a crack dealer. He proved he was guilty himself, but they went through the motion of the trial. Because he was only 25 there were folks on the jury that wanted to give him the benefit of a doubt and not sentence him to hard time. It was his 4th conviction, they were convinced he was guilty just didn't want to "warp" him with to much prison time.
I listened to all the evidence, I listened to him stumble around on his answers, I listened to the charges he could be convicted of. Then the jury voted once, guilty.
I would always do my duty. We got $9 a day but I turned it in to my principal and they paid me my wages. It was interesting seeing people try to get out of jury duty. That's the judges nightmare!
Interesting question!