Being a prominent figure in my community, former Deputy Sheriff, former Master Police Officer, current Firefighter, current EMT for local EMS, Dive Shop Owner, Instructor Trainer, Public Safety Diving Instructor, Under Water Criminal Investigator Instructor, etc., I take it upon myself to educate as many people as I can here in my area. Not only on Scuba Diving, but also on the impact (good impact) divers have in local waters. You are completely right, there are so many people that use our local waters and have no clue what a dive flag is. Being a former Law Enforcement Officer in our area, affords me the opportunity to alert and notify our local wildlife officers (boat patrol) and local deputies to the importance of educating the community. We also have a Coast Guard reserve unit on our local lake that does boating classes that we at Lake Hickory Scuba Center assist by teaching non divers what the flag is all about. I would say be proactive and introduce the flag topic into your other forums. It can only help. We stress that here in North Carolina it is state law that any public waters a flag must be flown while divers are in the water.
North Carolina General Statute 75A-13.1
(a) No person shall engage in skin diving or scuba diving in the waters of this State that are open to boating, or assist in such diving, without displaying a diver's flag from a mast, buoy, or other structure at the place of diving; and no person shall display such flag except when diving operations are under way or in preparation.
(b) The diver's flag shall be square, not less than 12 inches on a side, and shall be of red background with a diagonal white stripe, of a width equal to one fifth of the flag's height, running from the upper corner adjacent to the mast downward to the opposite outside corner.
(c) No operator of a vessel under way in the waters of this State shall permit the vessel to approach closer than 50 feet to any structure from which a diver's flag is then being displayed, except where the flag is so positioned as to constitute an unreasonable obstruction to navigation; and no person shall engage in skin diving or scuba diving or display a diver's flag in any locality that will unreasonably obstruct vessels from making legitimate navigational use of the water.
(d) A person who violates a provision of this section is guilty of a Class 3 misdemeanor and shall only be subject to a fine not to exceed twenty-five dollars ($25.00). (1969, c. 97, s. 1; 2006-185, s. 1.)
Here is a short video explaining the Law in regards to the Dive Flag in North Carolina.
The Dive Flag and The Law - YouTube