"Pirates!"
haha! No shit.
Black ice is one of those "daddy always said" things that has been adopted by the recent generation. So, in the 80's, everyone's parents complained about black ice, warned the fuck out of us when we went off to college in the early 90's, and now we're grown up and writing the news. Black ice! For our parents, it was the communists. Which is why the "evil empire" routine worked so fucking well. For us, it's dangerous weather conditions.
And, of course, it has the same theme as the evil empire days. The great and terrible evil empire was a bankrupt, starving Russia on her death bed. Black ice -- just as menacing.
Alternatively, it might be a government-wide effort to constantly remind us because they know we're all drugged to the gills on feel-happy drugs, carrying on three conversations with 14 cell phones and driving at 70 MPH with our lights off the wrong way down the Interstate.