I've done this countless times on planes/at hotels/in coffee shops, etc... I'll be explaining how it's done on Mac, but the premise is simple and I've also done it on Windows and I'm pretty sure it's almost easier on Windows which I'll explain. Step 1. Find paid network WiFi. On planes this is "GoGo Inflight" usually. Step 2. Open up a WiFi / network scanner, no not your computer's default one. I use Kismac. You want a scanner that shows you a list of access points / their MAC addresses, as well as the connected users, their mac addresses, and their data traffic (up & down). Step 3. Find "Gogo Inflight" in your scanner. Look for the devices with the most download/upload data, these are the ones who are on the internet. Look at the MAC address of these devices. These are people who have paid for the internet on Gogo Inflight. Pick the one with the most data downloaded/uploaded. Step 4. Take the MAC address and open up Terminal, type in sudo ifconfig en0 ether xx:xx:xx:xx:xx:xx (replace
