If someone challenges you, and your answer is "Do you know who I am?" – there is a book you should read.
It's called "A--holes, a Theory" by James, a UC Irvine philosophy professor. It's 201 pages (Doubleday) of erudition about how a certain mindset is prevalent – even successful – in modern corporate and cultural America. In the end, his message to people for whom the word "jerk" isn't satisfactory begins, "I write hoping to persuade you to change your basic way of being."