The document discusses privacy and security concerns with Web 2.0. It notes that with Web 2.0, more private information like messages, likes, and mouse movements will be collected and shared. There are questions around how this information will be used, such as employers screening job applicants via social media. Security is also a concern, with the average of 28.5 people becoming victims of identity theft each minute. Responsibility over privacy and security on Web 2.0 sites is unclear.