We start this course with a brief history of the Internet and World Wide Web technologies, their evolutions, how they operate, and how they are used. We then explore contradictions of these technologies. We first explain the tremendous innovations they have created over the past several decades, then point out how these technologies are increasingly being embraced as instruments of control, monitoring, cybercrime, and oppression by powerful institutions and governments. We look at how the leading high-tech companies, including Amazon, Google, and Facebook focus on providing greater conveniences for users, and how such data personalization techniques can contribute to more isolation, less tolerance, and limited diverse perspective. Using live demonstrations, we conclude by showing examples of cyber-attacks.