When most members of the group are in favor of it. But even then, I would suggest that the procedure be ameliorated by giving a nice gift and an apologetic note to those stopped who just happen to share a physical characteristic with some bad people.
No further explanation needed. All comments welcome.
I like this post, enjoyed this one appreciate it for putting up. “We seldom attribute common sense except to those who agree with us.” by La Rochefoucauld.