I think it's situation and locations dependent. In many locations that I travel in (what most people call Northern Canada, but is really Central Canada) it would be considered ignorant not to stop and ask if you he/she/they need some help. This is especially true beyond the range of cell phones. But is is a difference between an urban and a rural mentality. There is still a world out there in which people will slow down and wave or just stop and say hello when they are passing another vehicle on a narrow gravel road. Its a way of life not yet forgotten, but often overshadowed by news reports of violence, TV program's, and looking to long at certain select areas of North America where their is a car jacking problem. It is correct that I would not stop to help someone on a south Florida highway or in East LA.