It seems that WTF is yet another letter combination that cannot be on license plates, and is recalled along with XXX and other questionable combinations. Eventually, perhaps, we will have much larger license plates so that we have room for our surnames and the last four digits of our Social Security numbers. That's when I'm going to change my last name to Gregoria-Armhurst-McFarland-Fitzgerald-Murphy-Zimmermann-Smythe. Legally. ARG.