But their liberty was initially deprived by their decision to enroll in a school that has a student conduct policy. I think we can go around and around on the due process arguments, but, as you say, any school can institute a student conduct policy with or without receiving federal aid and in many instances, those codes may go well beyond what is required in Title IX. As part of a social contract, most of us give away part of our liberty daily. There are multiple social contracts that govern our daily lives and these contracts usually require subscribing to a set of procedures that limit the totally free exercise of our liberty. In your example, you would have to clearly establish that there would be no enforcement in these types of situations "but for" the guidelines issued by the Federal government. I don't know how compelling that argument would end up being.