TO: All Blacksmiths
FROM: Santa
I have finally caught on that you clowns have been deliberately misbehaving in order to get free coal. I considered leaving reindeer xxxx in your stockings, but you characters would cheerfully burn anything in your forges with a carbon content that didn’t cost you anything. From now on any misbehaving smiths will receive a stocking full of clinker (The only thing you guys WON’T put in your forges)!
P.S.: Putting a “Welcome Santa” sign above your forge chimney is NOT funny- A coal fire is over five times hotter than a wood fire!