The following answers contains many Bible verse links and a few hamburger recipes. There, now you have read all your answers in 2 convenient sentences.
It depends on how many and how often you eat cheeseburgers. If you eat too many in one sitting you could die from overeating like that guy in the movie Se7en. Otherwise in the long term the effects of eating cheeseburgers could manifest themselves in terms of health issues, in particular cardiovascular disease. I don't think threes a link between Voodoo and cheeseburgers although it is a pretty funny and random combination of things which is a good source of entertainment for me at 12:49am. All the best...
Dead cows coming back to life before you eat them, no problem; coming back to life in your stomach and competing for available space with the Coke and the fries, ooh, not so good.
Recent studies indicate that cheeseburgers actually improve Voodoo abilities just as much as Voodoo enhances the cheeseburger experience. Chow down as many as you want.