When I was in gym class in high school, my teacher insisted that I had to take out EVERY BIT of jewelry that I had, so every day before class I had to take out 10 earrings and the barbell in my tongue. Then after class, I had to put them back in.. but I never had enough time in the locker room, so I would do it in the gym while we waited for the bell.

I got LOTS of weird looks... and "ewws" and plenty of other comments.

Other than that, I don't change jewelry much in public so it isn't a problem.

(My roommate has gotten to laugh pretty hard at me during a jewelry change, though. I put a cbr in my nostril, and then I couldn't get the ball back out... it WAS pretty funny though.)

I have to flip my tragus tunnel round and put a bar with a smaller ball in my conch every time I put my ear plugs in. Which in public is usually twice a week.

I havn't had any comments about it.

I take out my plugs and play with them in public all the time.  I've gotten ewws from a couple people but oh well.
Also I used to have to take out my lip piercing for band all the time.  A couple people commented on it but nothing that weird...

My septum falls down when its flipped up all the at work I'm sure it looks like I'm picking my nose. Also i blew my nose at school the other day and my septum ring came out in the tissue. I take my plugs out in class all the time lol.

This is something that happens from time to time. You'll lose a ball or something and you have to fiddle with your jewelry in public. For example, I lost a septum bead today at BJ's and my girlfriend had to screw it back on for me.