Gazrok correct, someone going to lead some of these groups with a high intelligence that's going to preach the 'promise land' (food & water) blind faith have led many to their damnation throughout history today is no different.
For the most part gangs and stragglers are going to keep to the main roads, following rural roads doesn't mean a destination unlike main roads and highways that generally leads to other towns and cities and a lot of in between but as already mentioned, if a leader or group member is familiar with the rural areas around a given location then perhaps those folks will have a problem on their hands this is a good example why communications is needed with a spotter for alerting the homesteads in advance and why having a BOB is imperative and another reason not to store all the food and supplies in the house though doesn't mean we move our food and supplies out now just have a hidden place in position and ready, a good number of my stuff will be moved to a hidden location after shtf. Everyone has to evaluate one's situation, at my location I have time to make these logistical changes.
If one is unable to relocate, relocate supplies then fortification should be a priority, I've seen an lot of ingenuity for apartment preppers from having materials on hand for securing doors, windows and in one apartment I seen a couple have pre-cut for windows and doors 1" plywood stacked on the bedroom floor and that's what their box springs and mattress laid on, in another apartment a gentleman had 1" plywood cut in half 2'x8' then use piano hinges to re-affix the panels, he pieced together enough panels opening like an accordion to secure his glass sliding door, these panels were decoratives inside the apartment like a setting bench until needed. There is a lot we can do regardless were we live.