Interesting concept overall. Removing the automatic disconnect might be required here, in order to make it function properly.
Drowning people sounds fun 
I have the feeling there would be a surge of pk areas and less safe ones, though. |
Well, there would probably be more nopk areas actually (or you could invert the rules and get more pk areas). You can play with the concept here:
http://www.bitstorm.org/gameoflife/
The act of adding a yellow square would be like a level becoming overpopulated in the model I gave. A level would necessarily have to reach the threshold population before becoming a PK area or other PK areas becoming spawned. A step can happen some arbitrary occasion (when a timer hits 0, when a level becomes overpopulated, when someone says some magic word, etc). Unfortunately, it's a grid, so it can't really model inside levels. Inside levels would typically stay nopk unless they became overpopulated themselves with the modified version of rules I gave.
Drowning ganis already exist.
So anyway, one effect would be that you could gather a posse and then go as a group to a noPK level to surprise some idlers.