You can read/watch a more detailed version of this story here.
This makes me sad. While some might laugh and make light of this man's belief (and trust me, that was my first reaction, too), I've come to see situations like this one in a much different light of late. I refuse to believe this man is dumb or simple minded.
This is a clear example of how easy it is for one's beliefs to trump their reality. the number 666 is more than just a number for this man. He's been taught to fear the number. He's likely consumed himself with thinking (and over-thinking) the danger that he believes comes with this number.
Many of us have probably done similar things. Maybe not because of 666. But likely, we made similar choices based on something that we believe and ignoring the reality that is in front of us (or all around us).
In the end, 666 is just a number. But this man is now without a job. And that's not just a harmless reality. That sucks.