On more than one occasion, I have see people wearing cross necklaces, with the cross threaded onto the necklace at two ends, so that the cross is sideways, slightly diagonal.
I have an idea for what it means, but I am withholding, as to not bias the discussion.
As in the lanyard goes through two arms instead of just one? Sounds to me as a way to provide two points of attachment for a heavy pendant, and to possibly avoid having the free-hanging end poke the wearer whenever he/she bends over.
Or they could be insincere Satanists, not willing to commit to a full-inverted cross.
Or Manichaeans. 
I just saw this yesterday on a new employee. It was a small delicate cross on a small delicate chain, but the chain was attache to the cross at the (normally) top and bottom of the cross, making it hang sideways and since the bar is longer on one side, it seemed a little askew.
I assumed it was just a new fashion as jewelers are always looking for a new, popular ’ it thing’ for folks to buy.
So that the cross doesn’t dangle perhaps? I could see athletes or soldiers doing this because a cross flopping around could become a nuisance. Also, it may signify Jesus dragging the cross to the crucifixion site. Or both.
Found a picture. And they are sold out. Looking at the infinity necklace in the associated pictures it appears that the cross is to be worn higher up the neckline and not at the bottom; perhaps so it can pulsate along with the artery in your neck.
Wait! It’s Evil!
