I work in education. Earlier today, I was accidentally out of the room during morning announcements (I'm usually sitting in the back). When I came in, the pledge of allegiance was going HARD. It took all my willpower to prevent myself from sprinting to my desk to sit down so I wouldn't be standing during the pledge of allegiance (fascist brainwashing!).
Evidently, my behavior was conspicuous and my coteacher asked 'Are you an objector?'
Sheepishly, I replied "...yeah."
On 9/11 of all days.
I like this option because it seems more disrespectful.
Extra points if you yawn loudly.
Pick your teeth, spark up a j, spit, whatever.