Questions about nap

[JnhoKaddia]

1) Do nap's affect neighborhoods that are all commercial lots? Or do they only work in places with at least 1 mailbox and or community board? 

2) How bad is the sharing is caring now? Say there is a library in a neighborhood with some residential lots and sharing caring is on. Do I have to be worried the entire library will be swiped clean and thus making me have to rebuild it all over again?