Bram Stoker didn't "invent" vampires, so he can't exactly be considered the authority on them. Vampire stories have existed for billions, possibly even hundreds of years.
In short, Vampires can look like whatever you want them to look like. People can believe that they're fluffy and white with abnormally large ears, yellow eyes, trousers that are much too short and tacky plastic jackets if they like. Black shoes with white socks is one step too far, though.
I think an excellent way of getting Sam & Max 2 onto the production lines would be to harass Mike Nelson's assistant. If anything, it would teach her that lying is wrong.