What the frick?
He doesn't look all that scary to me.
Ok, let me begin the rant. Most likely (though I am just guessing here but this is very likely what happened) the reason the clerk was so offended was because he was probably a Christian who associates an upside-down cross with Satanism. That is not the only way that cross is used, it is also used in Catholicism (yes, a Christian religion) as a symbol of St. Peter, who was crucified upside-down. And even if he is a Satanist, this country was founded on the concept of the freedom to worship in anyway one would like without fear of persecution, so unless this guy had ran up and said "I'm going to kill you" or something similar, the clerk had no reason to deny him medical attention.
And what is more, the Goth guy offered to tuck in the necklace so it could not be seen, if it was so offensive. And the clerk still told him to find someone else to check him in. Personally, I would have made such a scene that the guy probably would have been fired on the spot. The Goth in this case was very polite in the face of such ruddiness, and I commend him for it.
Honestly this makes me loose faith in humanity a little bit. Thankfully nothing like this has happened to me, but that is not to say that it couldn't eventually. I can only hope that the clerk will loose his job over this.