[ZeroAdunn]

Actually, random checks aren't truely 100% random. There are certain signs that increase your chances of being screened. Things like bying one way tickets, paying in cash, not providing contact information, etc along the same lines.

Also there is a big list of names, if your name matches or is similar enough to a name on the list, expect to get screened.

And then of course, they do select random names......