Ok.. lots of vampire and creature fans here. So let me pose a question.
If you could bring to life these various creatures of darkness, knowing they would hunt you down for food and fun, would you? Is the reality of the undead too cool to pass up, knowing that your life could be in danger from bloodsucking creatures of the night?
Personally, I think it would be helpful to thin out the gene pool a bit. Plus i'm always up for a good fight.