Think about it this way...how would you react if a gymbro started yelling in the middle of your DL set to start your hips lower? Why do you think gymbro would feel any differently if instead you were yelling cues to him in the middle of his DL set?
If I want lifting tips, then I ask someone; otherwise, I want to be left the fuck alone. Most people feel the same way.
Even if somebody yelled the proper cue to me, if I wasn't expecting it, I wouldn't be able to process it and implement it.
I'm fascinated by the notion of place-exercise connection in peoples' minds at my gym. For some reason, the fixed safety squatrack at my gym is the go to place for anything that starts at hip height- hanging rows, curls, sometimes even deadlifts. I just watched someone wait 20 minutes for another person to finishing squatting so he could use it for three sets of three bb curls. There was an adjustable power rack and plenty of floor space open. I've seen similar things happen before, including one person getting super angry while waiting so she could do rows. Really weird.
this.
ive concluded that most people are afraid of lifting things off the floor. so many guys in my gym use the fixed rack to do romanian deadlifts with with 95 - 135 lbs. the best part is that the weights are no more than 2 inches off the ground in the bottom, yet theyll take up 1 of only 2 racks in the gym for half an hour to do supersets of 95 pounds. its very infuriating.