[JasonFruit]

Why ought we to ban the others? That you're okay banning certain activities is no justification for stopping those who want to do them.

[blip54321]

(1) Societal impacts sometimes are

(2) People not actually wanting to do them sometimes is a good reason too (e.g. free market forces, addiction, peer pressure)

China after the opium wars is a good example of how this can play out.