I was selected on a jury once, but only just barely. It was a drug-related case, and the defense attorney challenged the prosecution, who had made a peremptory

I was selected on a jury once, but only just barely. It was a drug-related case, and the defense attorney challenged the prosecution, who had made a peremptory challenge to remove me from the jury. His argument was that I was the only one even close to the age of the defendant left on the jury, and that by removing me he would be removing all of the defendant's "peers." (He was young; I was young.) The prosecutor withdrew his challenge, and I stayed. Funny thing was, I was pretty anti-drug at the time, so it could have backfired. But I ended up being the jury foreman and we acquitted without much debate after someone decided to ask if anyone in the room actually thought he was guilty. They didn't really have anything on the kid; the trial was a total waste of taxpayer's money. But you have an excellent point: If anyone writes online about supporting jury nullification, odds are good they'll get a challenge-for-cause any time they're in jury selection. At least if they're easily traced by name to those comments.