The joke called TSA

Unfortunately, "effective" is also known as "racial profiling".

Another case where political correctness has subverted simple logic.

Even children don't go fishing in areas where there are no fish because it's a
waste of time and money.

However, to be "PC," it is national policy that we waste huge amounts of time
and money searching people who have a negligible chance of being hijackers.
Which, of course, reduces the time and money available to actually work on
catching potential highjackers. Net result: Less safety, higher cost.