Why is it that the loudest people have the filthiest mouths?

I’m stuck at a campsite alone. We set up last Thursday (today is the following Wednesday) and it’s July 3rd.
I’m alone because Rick got called away yesterday on a family emergency.
This has really been an awesome spot until tonight. The partiers have moved in and that’s not surprising but ... why is it the loudest, the screamers also have the filthiest mouths? And they always leave the most trashed camp sites? What is the connection?