1) Defending you home, life and loved ones using deadly force
2) The right to bear arms and defend yourself
3) So-called hate speech crimes
4) Rights of a property owner to decline to perform a gay wedding in their establishment (coming our way in IL)
5) The right to free speech as posited in the article posted in this thread
6) The right to grow your own food for your own consumption
Hell, I could go on all day but I think the point is made.
Not all of these beliefs of yours have to do with serving on a jury. However, if you are called to jury duty, there is a process called jury selection. During that process, you have a duty to disclose any beliefs and opinions you have versus the law or the crime or the parties in question, any problem you would have being impartial. If you fail to do that and you are selected for the jury, you are serving under false pretenses, having lied about your true sentiments. MY POINT is that jury service is not the place or the way to change laws you disagree with. In criminal cases, your job is to determine if prosecution has met the burden of proof.