Um, we don't know that.
Well, we know what the newspapers have told us. According to news articles, he submitted a request, it was rejected, he built the pole anyway, and the board is telling him to take it down because they rejected it.
Now, it could well be that someone also complained about the pole, but obviously nobody complained about the pole before it was built, and since they rejected his REQUEST, it doesn’t seem they did so because someone saw the pole and complained, because it wasn’t built when he requested it.
Nor could the term “busy-body” really apply as it is meant in this case, as the board was asked to rule on the request by the homeowner, and therefore had a legal responsibility to rule, and therefore were NOT sticking their noses into something that wasn’t their business.