[GauntletWizard]

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.

[Zigurd]

Presumably animal fur isn't prohibited. You can catch nasty things from fur and hides, and some tanning processes are nasty, too.

[personjerry]

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?