Alright...how about a slim, 6'-3", well dressed man in a suit with a gun on his hip...oh yea...and with a full head of hair? Would this grant the complainant the power to ask that they keep the noise down?
As I said, I would have just hollered over to them and asked them to keep the noise down. Doesn't matter if he was taller or had any hair. He didn't mention what he was wearing, although it might add something to the story.
How CJ handled the situation was wrong.