Public Wi-Fi hotspots are everywhere. It’s estimated that by 2018 there will be 14m across the UK alone. They’re undeniably useful, giving us free (or cheap, at least) internet access and saving our precious mobile data allowances. But it’s not all good news. There are some very real risks with using Wi-Fi hotspots, and many people have no idea of the dangers or what they can do to stay safe.