Hair is a fairly dangerous product; Lice, fleas, ticks, and other nasties that can spread disease like to nest in it. It's technically a body part, and I only say technically for the sake of argument; It is a body part. Most people are grossed out by fingernail clippings, which are pretty much the same thing (Primarily keratin).
Hair (and probably fingernails, were there a market for them) is relatively easy to clean compared to other body parts, but it is still a potential biohazard. Having regulations and restrictions around it makes sense - And I'm a die-hard libertarian saying this.
Correct me if I'm wrong, but aren't those parasites only to survive on live hair, because of the heat provided by the head the shelter provided by the hair?
Hair (and probably fingernails, were there a market for them) is relatively easy to clean compared to other body parts, but it is still a potential biohazard. Having regulations and restrictions around it makes sense - And I'm a die-hard libertarian saying this.