People who beat, suffocate, and kill someone should be prosecuted under existing laws.
Anyone who wants to do "rebirthing" in a safe and legal way should be left alone.
There are many people, including many legislators, who would love to regulate and fine-tune everything--from whether or not you can smoke cigarettes to how much water your toilet reservoir may hold to whether or not you can do harmless rebirthing to what temperature your bath water should be. Every acquiescence to such things is a loss of liberty. They add up. Soon you're living in a Talibanesque society in which kites and music are banned and everyone must conform to a dress code. But long before it reaches that extreme, liberty is lost, and liberty is something valuable enough to die for. Any encroachment by government on liberty is to be resisted.