I have the same opinion, I like it when people correct my form. When I see some new guys destroying their wrists or deforming their spines I tell them on a friendly manner and they seem to appreciate it. I don't do this too much though. Otherwise, I concur with all the other points in this article.

my introduction to free weights was via powerlifting...so when I see guys benching thumless and feet on the bench...I cant help it ...its like verbal diarrhea. I mean if the guy does it all the time and says hes fine it still doent make it safe.

you would be at my gym ALL day if you helped out people. In Japan no one knows ANYTHING! They seem to just make it up as they go. OMFG. There are a maybe 5 guys at my gym who train correctly, IE form, not over training, and not wasting their time doing 10 sets. Half the guys walk around the gym with protective belts on, like for squats and dead lifting. They use them for curls, or what ever. They use them on bench, but then arch their back for EVERY rep. Every time I see a guy doing a triceps or biceps they are using their shoilders, swinigng their body. I could on and on and on. It is so hard to stay focused in the gym beucase everyone is doign something wrong. You wonder why there are only 1 or 2 pro Japanese body builders, come to a Japanese gym and you will see why. Not to mention NO ONE even drinks water while they work out.

Broken bones is the only way they will learn folks.

For myself, not being a pro in the gym, I'd much rather someone come up to me and tell me I'm doing something wrong. It's all in the way you do it, if you're polite and helpful, nobody will mind but if you're condescending that's a different story.