I was stopped by officer with sniffer dog a few weeks ago in Miami. Turns out one of the apples from the crew food tray had rolled from the tray on the jumpseat into my flight bag. I had no idea it was there. I apologised to the officer and he let me go on my merry way without a fine. I have a feeling the person in this story who got fined $500 was less than apologetic and made a fuss. But maybe not. The max fine is $5000 so it could have been worse...