For those of you not aware, Delaware is the only state in the union that has a totally flat tag. The standard tag is blue with gold lettering. If you have a low number though, you are eligible to get the replica tag from the 1940s with your number. Certain restrictions apply. Low, three digit tags have been sold at auction for thousands of dollars. Apparently even people in the UK have been apprised of the "black tag" phenomenon. Regardless, it's a collector's thing like anyone else. People will buy anything if you tell them it's cool enough. Look at some of the junk that is available on ebay or Craigslist.
Nevertheless, I think the black tags are pretty cool, even if there is a hint of elitism with them. At the same time, it bothered me that I saw a six digit black tag on a dark blue or black Mustang (#148558). Not only did the tag look junky, it demeans the whole prestige of having a "low" number. Or at least, that's what I would think if I had a low number and liked the fact that the number of black tags available is fixed.
Maybe the tag was fake, but it had an '09 sticker on it, so who knows. In either case, it was unusual enough to warrant this entry and further research as to whether the whole black tag concept is about to take a lemming run off the DMV cliff.
Apparently the DMV page has changed in the times Google has searched it (current page and cached page), but I haven't been overly successful in finding out whether this is a legislative change or not. Maybe someone else who is more familiar with all of this knows and can chime in.