How does he know these are competitors calling and not legitimate complaints?
For that matter, are you a member of any local social network thingies? I've on NextDoor, whatever that is, for the last few weeks, and I'm surprised to discover that every local business I knew about (and several that I've only now become aware of) are defined primarily by the random, petty (to me) seeming complaints they generate from the neighborhood.
I wouldn't be too quick to jump to the conclusion that complaints like these are "enemy action".
It is not unreasonable NOT to want these things in your neighborhood.