Officers or deputies are not typically required to know all the laws regarding business license, zoning, code enf, etc. IMHO....The proper SOP would be to make contact after being dispatched, ask for ID, if they refuse and do not appear to be committing anything major, refer to Code Enforcement to stop continued calls for police service, write an information report on the matter, chances are they have no warrants, and while these neckbeards are really taunting you and want you to violate their
rhats and be on their website, it is time to move along and worry about real crimes.
However if they were impeding traffic or on private property, that is another matter and a trespass warning will be issued if property owner wants them gone. If they were selling RPGs, or Hand grenades....call supervisor. Get back in the A/C and call your zone buddies to tell them to stay away from the neckbeards unless they are really bored....then go to the next disturbance or baby sitting task.