My 2 cents...
Yeah, using a mirror to watch your form on some excersises is usefull and in some people's opinion necessary. However, it sounds to me like you were working out in front of the dumbell rack! I HATE PEOPLE WHO STAND THERE IN FRONT OF THE DUMBELL RACK AND PUMP OUT THIER REPS!!! How the hell is the rest of the gym supposed to grab a set of dumbells? What? You can't take a step back or move away 10 feet?
I also hate those people that sneak a fart off in a crowded gym...geez! Talk about wrecking you set as you breath deep!
Everyone has a pet peeve in the gym! The only ones that are sacred are what you have your hands on. Be polite, and leave the egos at the door, and keep the testosterone under your skin!
Mirrors, dumbell racks, cell phones, yaking away... Just politely ask the person to
a)please move over
b)hang on a sec
c)answer that or turn it off please
d)move the discussion away from the machine or please use it.
e) ask very loudly "O.K. who the hell shit thier pants in here?"
If someone were to get pissed about the mirrors in my gym you'd get laughed out of your membership. The room is so busy mirrors there's no room to stake a claim on a section of mirror.
Ease up everyone...welcome to a society!!!!