While that is fair and that might mean damage has been done, there is no proof of that. As far as I know, no one has reported anyone else missing.
On top of that, while some of those supposed vampires might be dangerous, others might be willing to work with others. All I'm saying is that people might need to keep an open might before judging an entire species based on mythology or on a selected few.
That said, I still don't agree with blindly feeding all of them while potentially putting innocent lives at risk. So if the original poster person who wrote this expects any help, he will need to give a lot more information.