>  If I'm not mistaken, this is so severely imposed that an electric company
> feeding the system with even the tiniest discrepance in the frequency or
> phase is automatically dropped.

It doesn't work like that, you don't get to choose the frequency or phase of 
your generator when it is connected to the system.

An analogy is if you imagine 100 cars all fixed end to end on a track going 
at 100 km/hr.  The steepness of the track can be thought of as the current 
demand, each car as a power station, and the speed as the frequency.  It's 
the job of the controllers of the entire system to predict demand and ask 
more or less cars to join the train, and to tell each driver how much power 
to generate.  As an individual you can't set your own speed and be "out of 
sync" with everyone else, by definition of being connected to the system you 
are generating the same frequency and phase as everyone else.

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