I cant live in my house forever, whit some supplies and surrounded by barricades, on the streets and Zombies around.
I would join the army instead of hiding in my house forever.
But instead of a Zombie invasion, i would prefer something like a War of the Worlds, like, a massive M1A2 Abrams charge supported by Missile artillery and F15s or A10s, followed by a storm of ToW Humvess, getting destroyed by a Tripod.
<3