These services combine a bunch of Wi-Fi hotspots into a single network and get its users to split the costs. Also, by connecting to a fake Wi-Fi hotspot, you could get a virus, malware, or worse ransomware to your device.
Some hackers are so sly that they clone the mac address of the actual wireless network. Fake wifi hotspot 11), to create your own tools you will need to understand the Wi-Fi protocol.