 The multiple academic disciplines already long engaged in human subjects research (medicine, sociology, anthropology, psychology, communication) have established ethical guidelines intended to assist researchers and those charged with ensuring that research on human subjects follows both legal requirements and ethical practices. But with research involving the Internet—where individuals increasingly share personal information on platforms with porous and shifting boundaries, where both the spread and aggregation of data from disparate sources has become the norm, and where web-based services, and their privacy policies and terms of service statements, morph and evolve rapidly—the ethical frameworks and assumptions traditionally used by researchers and REBs are frequently challenged.