But the learned behaviour will be short => likely a shoplifter. Short people who don't shoplift will have to deal with being suspected of shoplifting at a higher rate than the rest of society. You could say that's just a fact of life, a minor thing, but it's still a privilege to not be in that group. If you then belong to multiple of these groups (dark skin, poor neighborhood), you become a primary target without ever having any intention of doing anything illegal. It's not immoral per se, but it does not set the stage for a fair society.