PULL THE STRING! Ed Wood movie, anyone? Eh? Eh? Eh.
I really wanted to include something along the lines of “it sounded like choosing to ignore an instruction given by another”, but there’s only so much room for Griffin-based exposition in a given comic.
Assuming someone is responsible for the vampires, there's no way of knowing who, but I believe it's safe to assume that it's whoever buys the last bagel dog before I do at the bagel place. Blueberry bagels are delicious, but they're not what I was hungry for WHO IS RESPONSIBLE FOR THIS?!
Or, more likely, the answer is somehow related to what has been accomplished by the presence of vampires. I mean, if you want to favor deductive reasoning over bagel dog related vengeance.