Does anyone remember common courtesy?

When you enter a store and someone is entering right behind you is it not common courtesy to hold the door for them? When you are the recipient of someone holding said door open for you is it not common courtesy to say thank you or at the very least nod or make some kind of acknowledging gesture? When you are driving in a parking lot in the pouring rain and some pedestrian is going to cross in front of you, is it not common courtesy to stop and wave them on, if only to save them time in the rain (since you are sitting in a dry car)? When you are sitting in your car in a parking lot with your headlights on, does it occur to you to turn them off and not blind the person who maybe trying to park across from you? When you hear someone sneeze is is not common courtesy to say Bless You ( I will leave out the "god" as to not offend anyone) even if it is a stranger. Weren't we all raised to show some consideration to our fellow human being? I know I was and I am only
27, yet I have run into people older than me that seem to have forgotten these common courtesies. I guess in today's high speed world we no longer have time to carry out some of these simple acts, but then again maybe it's just me.