[waterhouse]

If you forbid direct measurement of something, then people will use proxies, which is generally harmful to everyone involved.

If you want to minimize the extent to which people use demographics as a proxy for qualities they want to select for, then make it as cheap and reliable as possible to measure those qualities directly.

[tripzilch]

That only ends when you make it easier to figure out whether someone is going to actually harm your business in the future, rather than finding out whether they have ever been a felon.