Decriminalize Private Discrimination
We should support all businesses' right to discriminate, for whatever reason. The freedom of association implies the freedom of disassociation. Most business will choose not to discriminate, because it means less revenue, but business should have the choice. Of course, Airbnb knows it is likely to make up any short-term losses with long-term gains here by scoring some cheap grace and free advertising with this move. Banning right-wingers will not produce the backlash that would occur if a similar company banned gays or blacks, so businesses would be less likely to make such moves, but interesting niche markets would develop.