Use Kismac to collect MAC addresses with significant packets in/out, clone a MAC, ssh -D9091 to my remote server, tunnel everything through my local SOCKS5 port 9091. Works well enough for me.
I've done something similar with cloning my iPhone MAC to get free WiFi access on my laptop using the free AT&T WiFi provided to iPhones.
But if what you're saying actually works, this seems like a dead simple way of getting free access. I already have Kismac installed, so I'll definitely try it. Thanks!