Most interesting part is how, naturally, you're a "terrorist" if you have a radio in your car (you know, those shadowy, largely fabricated boogeymen of terror that are supposed to be hiding under every rock and around every tree, but which we never see). Guess that makes them all terrorists, eh? You're also a terrorist if you defend the Constitution, if you're a good person, if you want to live your life in privacy, etc., etc. The list goes on. Just ask me for a copy of the DHS reports/circulars that have been handed out to tens of thousands of business regarding what constitutes "terrorist activity." - Better not pay in cash! That's potential terrorist activity! (no joke).
Your friend was a victim of those who are trying to paint everyone as terrorists/criminals. This is hardly an isolated incident. It happens everyday.
Their definition of terrorist = anyone who questions their program, etc.