When Should Safe Zones Be Turned Off?

1.) 2 Weeks
2.) 4 Weeks
3.) 3 Months
4.) 6 Months

Most of the guys I play with (15-20 of us) are willing to bust our ass for a month (4 weeks) to build and fortify a territory if full PvP was turned on after that.

I am creating this pole to gauge what/how the community thinks on this.

-Big C