"Federal law can trump this, ..."
Do you really want the feds to get involved in you neighborhood?
No, I'm saying if this local town tries to enforce this law, you better believe they can be sued under federal statute, by the folks they are harrassing and the township will lose, and pay out a HUGE settlement, and possibly be fined by the fed as well.. and these folks can enjoy explaining to the townsfolk why they bankrupted the city over this.