Those particular ones are between the website and the person[s] signing up.
But that does not rule-out the possibility of the the law “between the law of the land and the individual” (as you put it) being violated.
So, when does the violation of a private agreement between two individual entities force the legal system to intervene? Is Facebook granted powers beyond denial of service, for a violation of those privately-agreed, non-notarised terms of service?