If you scroll up, you'll see Frondo asserting that "It [discrimination] didn't hurt businesses in the American south enough to compel them to stop discriminating."
Frondo is attempting to argue that market forces don't punish people (much) for discrimination. I'm simply pointing out that market forces weren't even allowed. People discriminated because the law said things like this:
"No colored barber shall serve as a barber [to] white women or girls."
"Any instructor who shall teach in any school, college or institution where members of the white and colored race are received and enrolled as pupils for instruction shall be deemed guilty of a misdemeanor..."
"No persons, firms, or corporations, who or which furnish meals to passengers at station restaurants or station eating houses, in times limited by common carriers of said passengers, shall furnish said meals to white and colored passengers in the same room, or at the same table, or at the same counter."
" Every person...operating...any public hall, theatre, opera house, motion picture show or any place of public entertainment or public assemblage which is attended by both white and colored persons, shall separate the white race and the colored race..."
http://www.ferris.edu/jimcrow/links/misclink/examples/homepa...