To be honest, if that happened to me, my response would probably get me kicked out and banned! Yes the kid was making a bit of noise but it could have been quite close to his max. I know I make quite a bit of noise doing deadlifts for reps. It's not like he was screaming or grunting during a set of cheat curls.
And that woman leaning over during the middle of his set.....
There are, IMO of course, too many gyms that clearly don't want people to get stronger because they promote crappy exercises and show short shrift towards those who try and push their limits. If you want quiet, stay home and read a bloody book or hit a library.
No excuses, just results.
Getting it done one session at a time.