FWIW, one strong vote against any kind of random blighting.
If you want higher density, blight the edges. If I still have to walk across regions where nobody lives, that's an increased MTTSH (Mean Time To !@#$ Happening) which is already high in some places.
Density doesn't do you any good if your habitable areas are pockmarked with inhabitable areas. Yeah you have more players per region but they also have to be closer in for that to be an advantage that will offset the folks who are losing regions.
I realize that this is a harder task in some respects, but a random blighting will seem heavy handed and arbitrary. Those are the top two things that caused most everyone I know who played BM to leave.
