Why do vampire bats rarely attack humans?

Here is the answer:

More likely it is because it is easier to feed on the animals outside than try to ear from humans who are normally indoors. Somehow I do not think crossing two sticks will help when you're sleeping!

VAMPIRE BATS rarely attack humans because bats hunt for food at night and humans are very often safely indoors or traveling. There is a chance you can become the prey of a vampire bat when sleeping outdoors. It is very likely when sleeping in areas of where they inhabit- caves, abondoned buildings, hollow trees, and old wells are a few examples where vampire bats will roost. The floor of the bats' home may be covered by many layers of bat guano. Sometimes, a bat or two will stray into a shed, barn, or garage. By simply placing a broom or pole in the bats' perimeter- not one bat ever needs to be touched- bats can be cautiously herded back outside towards an open door or very large, screenless, and open window.