Can you describe a little more the position and the Supreme Court approval you mention?
The Belligerent Claimant "The privilege against self-incrimination is neither accorded to the passive resistant, nor the person who is ignorant of his rights, nor to one indifferent thereto. It is a fighting clause. Its benefits can be retained only by sustained combat. It can not be retained by attorney or solicitor. It is valid only when insisted upon by a belligerent claimant in person. The one who is persuaded by honeyed words or moral suasion to testify or produce documents rather than make a last ditch stand, simply loses the protection. Once he testifies to part, he has waived his right and must on cross examination or otherwise, testify as to the whole transaction. He must refuse to answer or produce, and test the matter in contempt proceedings, or by habeas corpus." District Judge James Alger Fee United States v. Johnson, 76 F. Supp. 538 (at page 540) District Court, M.D. Pennsylvania Feb. 26, 1947
As practiced by some I know:
If you Google it there is lots on the web. When dealing with LEO's My usual first statement is:
"I am a belligerent claimant, I demand all of my rights all of the time and surrender none of my rights at any time."
Read and study if you intend to use it. it is not for the feint of heart or the person who shoots his mouth off to a cop. It has been to the Supremes in several cases and was a key point in one. At the very least do not surrender to any searches without a warrant or talk to LEO's without a lawyer.