Most indentured servitude in the US was a voluntary agreement [1] although all such agreements are now illegal by the 13th amendment.

Also, there exist the concept of a so-called "unconscionable contract." I'm not saying this proposition is true, but I'm submitting for evaluation: is the act of submitting to private investigation processes that may be used as evidence against you in civil or criminal courts unconscionable?

[1] https://en.m.wikipedia.org/wiki/Indentured_servitude_in_the_...