"Would be nice to know what those rights are and get that on printed material. The more travellers know what their rights are, the better."
You have the right to remain silent, anything you say can and will be used to get you to return to your own country. You have a right to an attorney, but we don't allow you to use your phone to call one nor will we call one for you because you're not under arrest (yet) so there's no use.
Probably something like that :P