Don't take any chances when charging your phone or other devices.
If you are not charging via a wall outlet, and instead are using a USB cable directly to a charging station like the ones you find in airports then you are at risk of having your phone data stolen, or your phone compromised by malware.
These simple and inexpensive devices block data from transferring in either direction and will only allow the current to pass through to charge your device. Shown here are the PortaPow 3rd Gen USB Data Blocker (Red 2 Pack).