Oh Lord.
Reading a book is not undignified. Its a perfectly logical thing to do on the subway, and therefore fits the situation. And so does plasticware at work – I only said “at home” because thats what you said. Yes, you are right,as I’ve said before – no one was suggesting that you may only do actions in life which are suitable before the king. It was just being used as a barometer, to show that when you want to look dignified you wouldn’t do this. I don’t know if I agree, but I think its a valid viewpoint.
If mod42 meant davening, thats a whole different story. Halachah clearly dictates you dress respectfully – because then you ARE standing in front of the king. (Yes, more than usual – I know Hashem is everywhere, thank you very much.)