Look, it's a commonplace that people don't actually speak in complete sentences all the time.
Had this been a prepared speech, it would have been rightly criticized for sloppiness.In the event, critics of Palin's response are exactly like the grammar police who nitpick on FR from time to time.
I’d say “similar to the grammar police”. Anonymous posters shouldn’t be held to the standard of a Presidential candidate.
But you’re right about what is commonplace.