If you need to recharge your phone when you are inside of the airport then you need an intervention. How did these people get by with just talk and text dumb phones? How did they get by without cellphones period?
Only that's a very narrow view.
Maybe I've been at work up until I got to the airport and using my phone. I didn't have time to stop and use an outlet - but not I'm at the airport with 30 or so minutes. My battery is borderline and I need juice if I'm going to be able to call for my ride when I land or some other reason. Of course it makes sense to plug in and charge up as much as I can.
No intervention is needed for keeping up at the speed of business.
Are you assuming that everyone is just depleting their batteries taking selfies, posting them on instagram and then checking their FB feed minute after minute?