The FUD against using public WIFI is nothing more than counterintel. If you are being careful with your cookies and being careful to only use websites in an anonymous way and make sure your WIFI MAC is randomized each time it connects (some adapters and OSs offer this option) using a public WIFI is much more private than using your home connection with a paid VPN. Excepting zero-day exploits of course, staying on the move with your secured laptop is much harder to create a profile of your activity than simply watching your home connection or using entropy correlation on your connection to a paid VPN. As long as you don't accept invalid certificates when connecting to your favorite password, email and storage provider, and you use onion sites for anything that could tie you to your true identity, there's little reason to be concerned about using a public WIFI connection.