Here's the trick. The Feds want the electronic devices off. Turn off the damned devices.
If we're getting a cabin inspection and we cowtow to popularity and say "What the hell! Angry birds for all!" the cabin crew gets fined or suspended. If the cabin crew reports that a passenger is non-compliant, they need to comply or will be removed from the aircraft. We don't have the resources to negotiate will hundreds of individual people and tolerate 100's of different levels of compliance.
Once word of a non complaint passenger hits the cockpit and the skipper sends me back, I have question with only one correct answer or they will be removed. I don't have time to hear the life story of why "Words With Friends" is more important than complying with the FAA's rules and the flight attendant's instruction to turn off the device.
99% of the passengers arrive on time, comply with FAA directives and follow uniformed crew member instructions. I am not going to make those passengers late or risk a violation for a damned electronic device that a single adult knows fully well what the rules are.
If you follow the rules and are compliant with requests, let's go for a airplane ride. If you don't think you're privy to the rules, well, we'll take you back to the gate and you can find another flight.
It's that simple.
Don't get me wrong, I understand that I'm in the customer service business. I'm jovial, friendly, work the crowd and if you don't believe me, ask ScreamingEmu's parents!

. However i will not jeopardize the safety, security or promptness of the flight because of a single, non-compliant passenger.
If you can't follow the FAA's rules, by all means, that passenger is more than welcome to charter a private jet. Because if we have to land short in Gander because of their inability to behave like an adult, my employer will bill that passenger for diversion costs and it's probably just a lot "cheaper" to charter your own jet and let the crew and more adult passengers enjoy our service.