This is not new. I always thought abou this problem when looking at people using power outlets at the airport, but didn't realize it cost so much.
Just ban the use of power outlets. That's what laptops' batteries are for.
If it runs dry, go to some kind of business center that you have to pay to use.
It's not fair to people who do not use the power outlets, let alone airports, as the burden becomes the taxpayers' eventually.
And forget the resonance power crap. The public will never allow it.
At $0.10 per kwh with a typical 90 watt computer power supply => $0.009 dollars (less than 1 cent) for an hour of use
It's not the energy cost
even if you had laptops pluged in to all the outlets in the place im sure there sucking down WAY more then that to start with i dont even want to thing how much power it takes to run the radar and radio