Small jets to orient the body will be the first thing discarded by purists. When this becomes an Olympic event body motion will be awarded points for difficulty, creativity, and artistic effect.
Will legislation be enacted—you know that behavioral stuff because it cost too much to cover this type of life-style or will their personal premiums be raised accordingly? I think not—it is only the smokers, fat people and common peoples habits that will be controlled/punished by life-style. Climbing mountains and space jumping are among the sports that mostly only the rich can afford. I doubt these people will be charged accordingly. It appears to me the slippery slope only applies to common people.