Is it just me, or does it occur to anyone else -- that printing the dreaded "SSSS" on the boarding passes actually negates the purpose of the random security check?

I mean, if they want these security checks to find random people who are hiding weapons/whatever, printing the "SSSS" just alerts that person to get rid of all weapons/etc. Or pass it on to a co-conspirator who doesn't have "SSSS". Many people by now know what this code means.

Isn't this stupid? Or is it just me?