Consent is the default state, because consent is the basis of a society. Civilization itself is predicated on consent, the social order that allows large numbers of people to live in close proximity and intermingle in a thousand ways.
Because people are people there are always laws. The laws may be imposed by a divine monarch or a set of elected representatives, but the structure of laws limiting activities always exists. They define what happens if the basic tenets of consent are breached, ignored, or flagrantly disobeyed.
The limits are not bright lines. They can never be. Even in as small a community as the Dope, gray areas and fuzzy lines appear every day. People can argue the application in any particular case, but those who insist that the Dope be run under a series of red lines to never cross are dismissed out of hand, as they must be. Lines are drawn here and there about some people and some topics and some applications, but they are always narrowly construed and arbitrary. Why they are here rather than there is always answerable by “because there has to be a here.” It’s an adult telling a child “because I said so” writ large, and a society’s legal code in miniature.
Few things are more futile than asking why gray areas exist. They exist because people exist. QED.