If you don't want them in a Save, you will have them, ie, you will see them, and see interactions to do with Vamps in the Menus. That said, I haven't had any of them drink my Sims' blood yet. I (knock wood) haven't had the Can't-Leave-The-Lot-Because-A-Vamp-Is-Breaking-In Bug yet, either. That would be annoying. I do delete Vlad because he has the Trait to get in one's house if he is determined to. I don't know if NPC Vamps will spawn with that Trait, but if so, I'll delete them as well. I haven't seen any yet in a few weeks of playing. It's better than TS3, because they don't turn any Sim unless active and they ask, so they don't overpopulate. I don't mind seeing them around town, and I use the Build/Buy objects constantly. Caleb Vatore is a waiter at one of my restaurants, and it's a kick because he zooms around with the hyper drive walk speed. I will eventually have a go at playing them and have some storylines planned.
