@20002ist @mattblaze Being an inveterate nerd, I decided to actually read the Geneva Convention (https://www.ohchr.org/en/instruments-mechanisms/instruments/geneva-convention-relative-treatment-prisoners-war). The answer is rather unclear…
Article 13 says "prisoners of war must at all times be protected".
Article 14 says "Prisoners of war are entitled in all circumstances to respect for their persons and their honour" and "Prisoners of war shall retain the full civil capacity which they enjoyed at the time of their capture. The Detaining Power may not restrict the exercise, either within or without its own territory, of the rights such capacity confers except in so far as the captivity requires."
And then it gets interesting… Article 82: "A prisoner of war shall be subject to the laws, regulations and orders in force in the armed forces of the Detaining Power"—what are the rules regarding bugging of members of the US armed forces? I have no idea what those laws are.
And then there's Article 92: "Article 88, fourth paragraph, notwithstanding, prisoners of war punished as a result of an unsuccessful escape may be subjected to special surveillance. Such surveillance must not affect the state of their health, must be undergone in a prisoner of war camp, and must not entail the suppression of any of the safeguards granted them by the present Convention." What is "special surveillance"? How does it differ from ordinary surveillance? Does the latter include bugged premises?