I agree somewhat with Runjor. Meatheads screaming bloody murder on every rep are annoying. But some level of making noise is to be expected. Not making noise during a workout is like not making noise during sex, it's just hard if not impossible to do to a certain degree. Dropping weights can also be taken to an extreme, but sometimes it is necessary also.
What gets me though, and what really makes Planet Fitness a disgusting example of the POLITENESS ON wimpification POLITENESS OFF of the American male, is their other rules. Namely: No squatting, No Bent Over Rows, No Deadlifts, No T Bar Rows, No chalk. They completely disallow some of the most effective and basic barbell exercises. A gym that takes a No grunting rule to an extreme is an annoyance. A 'gym' that disallows 3 major barbell exercises and one variant, limits the weight on bench presses to 225lbs, and limits dumbbells to 80lbs, isn't a real gym. Granted your average gym goer will likely never go that high with those weights respectively, but if you want to truly excel this isn't a place to join, and so what is the point of joining?
I say if you've never lifted a certain weight dumbbell, you don't get to tell me how to put it down. Also, if I owned a gym and were to install a Wimp Alert, or an 'alert' that drew attention to some class of people who were stereotypically seen as weak, I'd be sued for discrimination faster than you can drop a 100lb dumbbell. But when it's busy bodies who are interested in discriminating against men who don't haven't been clipped below the waist it's all fine and dandy...