... if as a juror you ignore such a basic instruction from the judge as not to discuss the case outside court, how on earth can anyone be sure that you are paying the slightest attention to any of the other jury instructions?
Do you mean just not showing up, or purposefully saying something dumb in the court room during the selection process?That's the problem. Juries are made up of people who are too dumb to get out of it.
Not working at the time, I had no excuse for not showing up, and assumed I would likely just spend most of the week in the big waiting room watching TV shows I'd recorded onto my iPod Touch. But not wanting to make myself look dumb, I did end up on a jury for three days.
It can be kind of interesting for some people doing it for the first time. But from my own limited experience and hearing anyone else talk about it, almost every jury will have two or three people who just don't listen and can't understand, despite very clear and often repeated instructions from the judge that should make things relatively simple in most cases.