When you hear the word, "vampire", what do you think of? Dracula (for you older ones)? Twilight? A kind of bat?
There are people who claim that their body's life-support system requires the ingestion of someone else's blood. I don't know who these people think they are, but there is no scientific evidence for this. It's mostly overly emotional teenaged drama queens who think that they have some magical properties because they watched Twilight.
It's the same way with most Neopagans. A vast majority of them are indeed overly emotional teenaged drama queens who can feel "vibes" in the air. If by energy you mean light, then yes!
Here's the message: take the world for what it is. Hurting others to serve your own beliefs is wrong.