You already have the wrong attitude. Helping others understand the rules and regulations IS "Minding our own business". "Our" business of being able to fly drones without further negative publicity, stricter limitations, or outright bans. What I, you, and other "drone pilots" do has potential NEGATIVE impacts to this hobby. If we let people do "whatever" they want which endangers the public or puts drones in a negative light it can and most likely will affect all of us with more anti-drone sentiment, more strict limitations, or outright bans.
There is a HUGE difference between "educating" and "lecturing" someone. No one is suggesting running up to someone new to the hobby and rattling off all the applicable FAA rules and regulations. There is obviously a right way and a wrong way to go about doing this.
My experience at a local park is that everyone that is new to drones has been extremely receptive to help. Because I fly several other drones and use this park as my test-bed after firmware upgrades or I'm testing some new features on any of my drones, new-comers to the hobby will usually approach me before I have the opportunity to approach them. After some friendly chit-chat, and offers of helping them if they have questions or need assistance with their drone, I drop subtle comments, questions to gauge how familiar they are with rules and regulations. Inevitably the conversation will turn to places where one can fly. Thats when I let them know about the FAA and the rules that govern and regulate drones and the airspace over the US. None has ever told me to "piss off", most want to exchange contact info.