Admittingly, I have a strong desire to be the coach when I see people not doing the full range of motion of exercises, people who are obviously working out for aesthetics and spend all their time on the treadmill when they should be lifting, and when I see perfectly healthy young people doing all their resistance exercises on machines. I resist the urge though.
Oh yea I also hate all the USDA posters on "healthy" eating and exercise in the gym at my work (I work for the federal government). I just want to tear them down and post some of Kiefer's articles on there.