The xfinitywifi network requires you log your device into a Comcast account. It's not strictly a "guest network" for arbitrary devices, it's more of a roaming access to your own account.
Pretty sure they can nail you even harder for piracy on this than on your own network where it might be someone else's device.
Pretty sure they can nail you even harder for piracy on this than on your own network where it might be someone else's device.