Bumper sticker I saw in Gilbert

I saw this bumper sticker in Gilbert, AZ the other day:



"I killed Asmodean"



I wonder how many people who see that actually understand the reference.

WOTever could it mean ? ;)

I was just texting Hawkwing about this last night how I saw the same bumper sticker.

I own one of those bumper stickers, though I don't actually keep it on my car...