Why are people so rude these days??

i sware people act like they have a protective bubble surrounding them that allows them to drive anyway they want,say anything they want on the phone where everyone else can here,take 30 items to the 15 items or less express lane at the grocery store.what really gets me is all the tv commercials,are all so heart warming and show people in a different world i guess,because the people in this world are just plain rude and inconsiderate of their fellow man!!!!!!!!!!