Tried that, didn't work. How about this recent example?...
I was doing deads in the squat rack and a group of three girls who workout a fair bit in the weights area walk up and ask if they can use the rack to squat. I say sure, go for it and step back another couple of feet and they grab a bar off the incline bench and move in. They then start doing those quarter squat things we all complain about. I thought, bugger it, they work hard in here I'll give them some form pointers. BIG mistake. I jokingly say "open your stance, flair those toes and see if you can get a bit lower". Alpha girl takes offence, racks the bar and rips my head off. Tells me I know nothing and that you can't go past 90 degrees safely as it opens the scapula on your knee. I respond by saying some powerlifters squat 300kg all the way down safely and she responds with well, yeah that's powerlifters which is completely different. I try and mention how she's only working quads and needs to get the glutes and hammies involved but she's not listening. I bow out. I then pull 147.5kg off the floor, put it down rather heavily 'cause I'm a bit pissed now, then walk off to get some water. As I come back, I see her talking to her girlfriend criticizing my deadlift technique.
Fuck this I say, I am NEVER EVER EVER going to try to help someone ever again. They can all go and fuck themselves.
OK, rant off.
Cheers,
Mike