I had a neighbor that moved in a couple of years ago that has three large dogs. She put up an electric fence that went around her entire yard, and would leave her dogs out all day while she was at work. I work from home, and would hear them bark bark bark bark bark bark the entire day.
Our first communication was me saying to her 'I don't think you realize this because you aren't home during the day, but the dogs are barking almost the entire time you are gone'. She ended up modifying the fence so they stayed in the backyard, and the noise problem was resolved.
I also have two dogs (three at the time this happened), and would leave them outside in our backyard (leave the door open so they can go in and out) that has a 6foot privacy fence. When they would start continuously barking, I would bring them in, every time (not for just a random bark here or there). I did notice that I was having to call them in less often, and it was because my crazy neighbor put up one of those bark things mentioned earlier in the thread.
I was not offended in the least, in fact, I tried to pay more attention to the barking thinking maybe I had just started to tune it out, however he never said anything to us about it, so I never changed anything we did (continue to call them in when they were barking more than the 'random' bark).