That's a possibility in your book. Try it.... you'll be surprised of the results.

For starters, there is no such thing as a random event when a human does a selection. Humans are subjective individuals and will act based on their senses, emotions and thoughts. Screeners (being human beings, for the most part) use their EYES to create the "random" selection.

A couple of years back I witnessed what you call random screening. A m/f "dark" couple in non-western attaire was approaching the security point. The careful screener decided to start sending 'white' people to secondary screening prior and after the couple in question were screened. The couple went through without setting any alarms. Guess where they were sent? Come on...., you can guess.... easy question.... Geeeee..... nice "random" pattern..... select a few prior and after to be politically correct....

J.