My opinion is, if as a potential juror you think a law is unjust and you can't enforce it in good conscience, you should recuse yourself from the jury.
Which would give us the rule of MEN, not of LAW...the very opposite of freedom.
Please do not disarm our country of a major weapon against tyranny because you fear the instrument of our defense!
On a side note, I believe jurors should be drawn by lottery instead of being 'selected' by *officers of the Court*. Particularly since the word 'peer' was originally intended to mean people who were acquainted with the defendant.