My brother owns a guard company, and goes to small as well as large group meetings. From BD parties that might get out of hand, to those held in the Fairgrounds, he can provide protection and has on occasion called police.
I'm sure you have some like his group near you. If you think it might get out of hand, having someone impressive in uniform might make them think twice about acting up.
And yes, we have some of that sort in our family, almost every one does.