I am sure it happens, but I feel like a lot of people say they would lie but when it comes down to it and a very serious judge is asking you from the bench, I bet fewer lie than who say they would.

They also don't mess around with jury duty... one of our jurors went missing on the walk from the jury gathering spot to the courtroom, and the judge was PISSED. Sent the bailiff looking for them to hold them in contempt.