[Qwerty321]

I sure hope not. My car probably spends half its life idling, be it at signals or in gridlock.

Sometimes after a party if I'm too drunk to drive and its freezing I'll just turn the car on, run the heater and sleep in the passenger seat. Wasteful, I know, but Im not willing to ever drink drive it home and some mornings are just unbearably cold, so I just decide its worth forking out the fuel for the comfort. Considering usage is some 1-2L per hour on the readout, its not breaking the bank too much.

Anyway to answer your question. I have no idea whether idling is good or bad. Doesn't really matter cause your car will spend a hell of a lot of time idling throughout its life anyway, so idling for a couple hours to charge your gadgets really isn't an issue in the grand scheme of things at all.