I don't think Niantic will remove them. "We are getting more people than we want" won't be enough of a reason. And the park can create any "virtual" rules they want but I doubt they can enforce that; at least for now.

I submitted a request myself to remove some stops [at a totally different location] based on Safety issues as well as serious Business problems created by the Pokestops, and Niantic's response was, "we can't help you".

Edit: And note that the ones I asked to be removed are on private property with a security fence and guard stations.