Thorn - if you know the answers, then why are you asking people?

I don't think anyone who has NPD would consider themselves to be a false-self. Like anyone else, they would enjoy attention and having their desires met. People with NPD just indulge in fulfilling these more often than most other people, and with very little consideration of the impact on others due to their limited empathy.

I don't think you will be able to get any new answers to your question: some people cheat and lie, others do not. Many people with NPD do what they want with little consideration of consequences. Just like anyone else - they do things because they want to, if it happens to be something that will end in some sort of consequence then they may think they can get away with it, don't care about the consequence, or simply don't think of it before they act.

What are you hoping people will answer with?