In the literature on social research, adherence to the principle of informed consent is sometimes recommended on the ground that the privacy of those being studied is hereby protected. The principle has it that before becoming part of a study, a competent individual must receive information about its purpose, use, etc., and on this basis freely agree to participate. Joan Sieber motivates the employment of informed consent as a way to safeguard research participants' privacy as follows: "A research experience regarded (...) by some as a delightful opportunity for self-disclosure could constitute an unbearable invasion of privacy for... (shrink)