There's this one guy in our gym everyone call "The grunter" because he grunts so loudly on every rep of every set despite the fact he's not using much weight. Not only that, he supersets about 5 or more pieces of equipment at the same time so he's on everything and therefore gets in everyone's way.
This is in Thailand where people have a very relaxed attitude to everything, but I'm sure he wouldn't last long in US gyms.