It does seem to becoming a bit of a fad, albeit an illegal one in the UK. It reminds me of all those number plates with different fonts 20 years ago. Illegal, but they seemed to be everywhere for a few years.
There's probably a few factors feeding it
1) 5 minutes on the net will tell you most cars look miles better without them and it pisses people off we have to have them in the UK when so many other countries aren't bothered.
2) People are prepared to chance it due to the lack of cops on the road, particularly traffic cops these days. Even if a copper walks past a parked car on a public road with no plate, in this day and age are they really likely to bother doing anything about it? I seriously doubt it.