Kyra - The Chronicles of Riddick
There are a couple problems with this idea. The first is that it is still dreadfully expensive to put a man into orbit, much less send him to the moon. Another is that there are a whole bunch of people who claim they want to go into outer space. If we started exporting criminals, we might have a whole new bunch of criminals, people who commit crimes in order to get "transported". A third is that it is a whole lot easier to get back from the moon than it is to get there in the first place.