I happen to like the leg press ha.
I used to be bothered by what other people were doing, half reps, too much weight, whatever but now the only thing that gets me mad is being unsafe.
In my gym yesterday a guy was doing squats and someone trying to sneak around the bar to grab a 10 or 25 lb plate knocked into the bar on one side and the squatter lost balance immediately and appeared to seriously injure his knee, also the bar hit his head on the way down and cut it open pretty bad.
People(the one who bumped the bar) that don't have common sense and proper respect for others(WAIT 30 SECONDS FOR YOUR GOD DAMN 10 LB PLATE) scare the life out of me when I'm there.
As long as these people that screw up their training aren't hurting themselves or other people I say leave them alone until they ask for help. People are probably signing into messages boards saying "Dood I saw this newbz trying to butterfly 35 lbers and couldn't do one rep!!!" I was stretching and I'm sure glad nobody came to "spot" me or give me advice.
Yes there are douche bags that train bad all the time, but certain exercises I cheat on for effect and if someone only saw me train that day they'd assume I was an idiot, let's all just give people the benefit of the doubt and worry about our own training for once.