Creating laws adds some realism to it. It is the same with witches and wizards in Harry Potter. It makes it seem like they really exist. If they a governed by rules and laws, they blend in with society. I always preferred my vampires to be loners, but for some people I guess the need to be ultra fanboys. Really, the whole vampire thing is over-done. Twilight really destroyed vampires for me.

People like to pretend that fiction is real, hence the horrible EU, and it's constant scientific corrections of George's mistakes.

Fans like their movies, books, or fictional worlds to be perfect. If it is perfect, then it is real in the fans eyes.

I really don't care about vampirific novels or movies anymore.