Only in America would a lawsuit result from grunting.
That said grunting during a spin class
Looking at his picture and reading the description he sounds the type that would feel the need to assert his masculinity in adding sugar to his coffee.
There was a fat guy in my gym last week that was making noises while warming up doing flys with 20lb dumbbells. I can defiantly say it was irritating and unnecessary.
I mean everyone makes noises exhaling harshly when lifting or talking themselves through the last 100meters of a 10K run. I think it encourages the rest of us trying to push ourselves. But fake excessive grunting mocks those of us actually making an effort and yes makes me angry.
Rather than attack someone I just say quietly to one of the other guys or myself.
"Wow he must be must feel the necessity to overcompensate for one tiny cock"