Well, it is not like a few inactive nations aren't alright, but there are far too many (including some with names no RL nation would pick, like "Darius Kissenger" :/ )...besides, given the case I try to invade some of the inactive nation, the RP would be rather single-sided; I don't think RPing military actions is so much fun when you are your own opponent. RPing a civil war might be fun one time, but it will get boring if repeated frequently.
At least, I think the inactive nations should be marked as such, if not removed, though I'd still favor a second map purge.