1st: I don't like the term "Fudd". Most likely because if I'm not one I'm sliding right up next to it. Meaning that I am not now nor have ever been a high-speed low drag, sniper, commando or try to give the impression I ever was. I don't prepare for the zombie apocalypse, ninja death squads or gangs of 300# meth-head bikers. I don't carry enough, ah, let's see, how shall we say, gear ya that's it gear to invade the Asian land mass.
2nd: Just rack it and the sound will scare them away, then don't bother with all the hassle and responsibility of owning a firearm. Just download the sound to your stupid ever present annoying phone. Play it at full blast, as needed and see how that works for ya. More important if they are close enough to hear me rack the slide, they are too bloody close!
3rd: Rock salt and bird shot. Rock salt is a good way to get your tail sued into poverty. Bird shot can work in the right circumstances, so can spears, machetes, frozen paint balls, cap and ball revolvers, etc. We are talking about the use of deadly force and protecting life and limb. Quit screwing around.
4TH: You don't have to aim. Oh for crying out loud. really? Just how stupid do you have to be to buy that.
If we are being honest, the world of shotguns is NOT full of Fudd lore. Just people that don't know what they are talking about. Repeating nonsense they have been told without thinking or experience. Much like today's college graduates. No different than recycled Tupperware bottom feeders can't be detected by metal detectors, or AR stands for Assault Rifle. ad nauseam. 
Not meant to be offensive just having fun, God Bless.