Ahhh, Christmas, carols fill the air along with the aroma of baking cookies. hearts are filled with joy, and Santa sends out obscene mail to good little girls and boys. Here are some stories of holidays gone bad, including some from holidays past. Ho ho ho!!!Author of nasty letters from Santa sought Fri Dec 14, 2007 11:39am ET OTTAWA (Reuters) - Canada's post office and police are trying to track down a "rogue elf" who......