I was at the gym this afternoon and this girl is on the leg press station. She's got 5 lb. plates on each side! And then she does about 6-8 reps each set! Not to mention she practically had her feet side by side while doing the exercise.

I understand the motivation for doing low weight/high rep. And if you're new to an exercise and want to do a warm up, sure no weight is totally acceptable. But doing a bunch of sets of leg press with 10 lbs on there is a little silly. Why not just do some body weight squats or something?