http://online.wsj.com/article/SB10001424052702304070104576399433777333002.html?mod=WSJ_Opinion_BelowLEFTSecond

Today railroads and hotels, along with almost all providers of public accommodations in almost all circumstances, are prohibited from discriminating on the basis of race. So what happens when you ride on Amtrak, the government-subsidized railroad? You hear an announcement over the PA system advising you to be prepared to show your identification if the conductor asks to see it.

Likewise, these days there is a good chance you will be asked for identification when you check into a hotel. You need ID to board an airplane or to drive a car. Recently we visited a doctor whose office is in a hospital. Just to enter the premises, we needed to present ID to a security guard.

If black people have trouble producing identification, how come nobody ever claims that these requirements are discriminatory?