The potential dangers of using public Wi-Fi networks include exposure to cyber attacks, such as man-in-the-middle attacks, where hackers can intercept data transmitted over the network. Users might inadvertently connect to rogue networks set up to capture personal information. Additionally, public Wi-Fi is often less secure, making it easier for attackers to access devices or data. To mitigate these risks, it is advisable to use VPNs, avoid accessing sensitive information, and ensure connections are encrypted.