I have to disagree. While it is definitely possible to use the language of politeness in an offensive manner, there is still a place in the world for "please"

I have to disagree. While it is definitely possible to use the language of politeness in an offensive manner, there is still a place in the world for "please" and "thank you", so long as they are sincerely offered. I do agree with the OP that insincere politeness may do more harm than good. However, I believe that our words usually reflect our true thoughts and intentions. If you never say 'thank you' or 'I'm sorry', then I'm forced to conclude that you rarely feel grateful or regretful for inconveniencing others. Politeness isn't simple verbal formalities, it's a way of thinking that influences all our human interactions. The words of politeness should follow from sincere feelings. It's never been easy, and may indeed be getting harder. However, to my mind, that makes politeness even more critical than ever before.