I feel like.. marauder groups is going to be the big problem..
Can't realistically defend a suburban home from them, because of the distance issue..
This won't happen initially, but eventually, as the general population all die out, the surviving marauders would've had time to become quite organized and large in number..
You can't really stop more than 8-10 people without alot of clear distance to shoot at them..
If you live in suburbia, gonna die for sure..
And suburban homes are just not armored against ANYTHING..
you can get through regular houses with peashooters.