So, You'd like a real fight? You've won the #1 rank? I ask you to please use this hidden fight. Go ask the Mysterious Hermits about your rank. He will get annoyed and fight you. (eventually) Anyways, Great game!
I gotta say, with all the weaponry you get couldn't you just mass up gunman and invade their camp? I mean you wouldn't have to worry about these guys anymore.
The problem with staying home (at least for most people) is that while you may have food and water for a while that will soon run out. A phone will be worth absolutely nothing as phone lines (or the phones themselves) will be destroyed.