A "no pets" policy, on its face, would have a disparate impact on different arms of a protected group, and so, on its face, should be illegal. I know that "no pets" policies tolerated at this point.
What I want to know is how you or anyone else can justify a "no pets" policy considering the protected group issue I raised above. Is the "no pets" policy just an unprincipled exception [1]?
I see no explanation for allowing "no pets" policies other than "yeah, 'no pets' amounts to illegal discrimination, but everyone does it, so it's okay". That's not a good basis on which to organize a society. Why or why not shouldn't people make another unprincipled exception for ad targeting?
[1] http://slatestarcodex.com/2015/03/04/a-series-of-unprinciple...
