Welcome to the 21st century version of discrimination/segregation.
Nothing new here, yes it's legal but you can't afford it so fuck off.
Here's an example that being played everyday in broad daylight and no one complained. Want to live in Grandview/UA. Entrance fee is ~$500,000 for a 3 bed/1.5 bath 2000 sq feet home. Right smack in middle of GV and UA is a strip of Columbus properties that can be bough for less than half the $$, it's still expensive compare to the rest of Columbus but you're in the middle of GV and UA so you're "safer" than the rest of Columbus. Your kids are not going to go to GV and UA schools. If that not enough, the property tax in GV and UA is about double that of Columbus. So basically GV and UA are not blatantly telling the poor folks of Cbus to get out of their cities, but you just can't afford to stay here so fuck off. Kinda like your business model above. But usually with the business if you know/find the right people you can "grease the wheels" and the second or third time around you'll get your way. Again, if you can afford the "entrance fee".