Tisha
Great topic!
If we have good standards for behaviour and other situations, then we should never change just because others have. Here in UK, there's the same attitude of "screw you/f*** you". It's even more disappointing when close family members behave that way.
Don't feel you have to "run with the pack". Life does deliver knocks. The frustrations we experience as often because others behaviour falls short of our expectations. Be assured, there are people who will still be helpful, polite and caring. Makes you feel good, as I experienced in supermarket the other day. Couldn't reach item on shelf so asked man next to me. He was really nice and it calmed my frustration at only being short!!