Why do we think that rules are made for other people and that we should be exempt from following those rules?

For instance, if I pull my car up to a place where there is a sign that says, "No parking." Why do I think that think that this sign is not meant for me, but rather that it is for other people? And if your teacher tells you that your research paper must have a cover page and I don't have one on my paper, why do I think I should not be penalized when I have obviously not followed the rules?