This article examines the possible basis for legal liability of researchers who use the Internet in the collection of research data. In particular, it examines the potential legal issues associated with the protocols of ethnographers who use listserv, discussion board, blog, chat room and other sorts of web or Internet-based postings as the source of their data. The author assumes that the forum for participation is legitimate, in that the list, board, blog, chat, etc. is not created or otherwise concocted (...) by the researcher, but involves situations akin to off-line practices where a researcher would be listening to the conversation or watching the behavior of subjects in a public place. Since these practices do not involve direct interview or interaction with or treatment of "human subjects", much of the precedent involving negligence, informed consent, and related issues is not relevant; however, it is reviewed initially for guidance in suggesting the applicable, legal standards of conduct. This article does not discuss the use of the Internet as a collection device, e.g., in online surveys. Issues of legal harm arising from claims in negligence, privacy, and defamation for subsequent disseimination of such postings are evaluated. Although it is concluded that the likelihood for a success of such claims is small, analysis will include steps that researchers can take to ensure that such risk remains negligible. (shrink)