My first gym was a nautilus. The management started me out by taking measurements and running me through circuits, teaching me form and tempo before turning me loose.
They also designed a program for me and I guess I was just responsible enough to ask questions if I didn't know how to do something properly.
I see people doing stuff with such incorrect form and ROM that it's absurd.
I dunno what a gym should actually require in detail, but figure a new member should get a basic rundown of the equipment and free weights, instead of just handing them a membership card and turning them loose.
But then maybe it's the individuals who should be sure they have proper instruction. A little bit of common courtesy would go a long way as well. For instance, the guy up against the dumbbell rack blocking 12 dumbbells while using 2, with a space full of other people using them 4+ feet back. Dude had to realize he was in the way but just didn't care.