Would you if you could run a private server?

If ANet decide to terminate GW1 service, I do hope they provide us possibility to run private server legally. (getting the private server code for free or some payment) As long as we could have possibility to keep playing GW1 even though without ANet support.

This to be address only if server GW1 going to the end of its service time.

Otherwise, there are almost no need to have PS for GW1.

The only reason I would is to make masses of Human NPC's and Charr NPC's and make them battle.

No, as long as they keep the servers, there is no need, and if they go down forever, I'll look for another game.