Your smartphone, tablet or laptop is most likely set to automatically connect to any available Wi-Fi network. This could allow your device to connect to public Wi-Fi without you knowing, which has privacy risks. You can disable this feature in the Wi-Fi settings on your device. Hackers set up malicious Wi-Fi networks in order to steal information from users who automatically connect to public networks at hotels, airports and coffee shops. It is generally safe to automatically connect to known networks like home and work.