If your Wi-Fi name (SSID) is on this list, you're at risk.
If you ever used a Wi-Fi whose name (SSID) is on this list, you're at risk.
The list consists of approximately the 5000 most common SSIDs.
broadcast SSIDs, your laptop or phone may automatically connect to them. At that point, they see everything you do; user names, passwords, etc.
In a nutshell, program your device so that it does not automatically connect to a Wi-Fi SSID to which it has previously connected. Purge your previous connections list just to be sure.