I'm not about to drive around to all my neighbors and let them know if I am going to do something that makes noise. Now my one neighbor is quite close, so if they are outside giving kid lessons on their horses, I'm not going to go fire off guns, light fireworks or anything of the sort but on a regular day? My property, my guns, my right to do whatever I want that's legal.
My horse was pretty darn spooky about gun shots.... couple months next to some neighbors who love target shooting AND coincidentally are training for mounted shooting, he doesn't give a hoot about gun shots. They didn't warn me, I only knew about the mounted shooting training because they invited me to join them.
The BO where I have my horse is always offering to turn off his generator, not be using his tractor, hooking up clangy trailers or whatever while I ride. I always tell him "Oh no, you go right ahead! He might be scared today but TOMORROW, I won't have to worry about him being scared of that again because I will ride him through his fear".