Leave or Stay?
Basically, was Patrick right to want to leave? With the numbers of the Zs growing on the outside of the fence, there's no guarantee they could have stayed safe forever. Perhaps getting out, staying mobile, and trying to find someplace more remote/secluded would have been smarter?
Or, would it be better to "wait it out" in the hopes that the outer defenses hold up long enough for, say, the Zs to start rotting away and becoming less of a threat?
I'm not sure what I'd do. I think my instincts would want me to stay put. That place was pretty secure.
One thing is for sure, they should have killed Patrick immediately upon learning that he planned to leave and put them all in danger.