I think there needs to be some ethics here. We need partnership with Ecotricity - even if we dont believe in the newly introduced charging.
We need a postive dialogue, with Ecotricity, that ensure that we get the best Quality of Service. It's bad form to say 'in the clear' that users will play with the Wifi/3G Comms and rip-off Ecotricity.
I suspect that much that is written is tongue-in-cheek - but who knows if Ecotricity will read it that way?
What we need is to provide advice on how to maintain 'reliability'. A switchover to free is a sensible idea, use of a 'White List' would be less available (you would have to be a returning user). If Ecotricity want the revenue (and no free service) - then, maybe, they could have an automate phone service which would take you CC details and enable the machine for one standard charge. But that would need your phone to trigger the unit (wifi/ Bluetooth) - once and once only - tricky?