Ummmmmmmmm..... the whole purpose of a flower is.......  to attract bees and other pollinators..........  so I am afraid the guy is out of luck.  He may direct his complaints to Mother Nature.    I don't think there are any people laws on the books regulating what people can and cannot plant regarding attracting bees, although I guess it may fall under an attractive nuisance clause if someone wanted to push it, but I don't think it would get very far.  Dunno.