My definition, the definition that I've always believed in, is that esprit de corps means love for one's own military legion - in my case, the United States Marine Corps. It means more than self-preservation, religion, or patriotism. I've also learned that this loyalty to one's corps travels both ways: up and down.
When you were growing up, your mom and dad told you to look both ways before crossing the street or not to get into a car with a stranger. It's the same with the Internet. We have a big responsibility and a huge role in bringing all the stakeholders to the table - users, parents, educators, law enforcement, government organisations.