This author seemed to be remembering back to her days when students COULD sit and talk quietly, because those students that got out of hand were quickly brought back in line with a warning of a phone call to a parent. Try calling a parent now--the student is always right and the teacher is always wrong.
And no, I didn't act like that--I was the resident bookworm sitting in the corner reading.
However, the thrust of the letter was that the socialization of kids is now lacking due in part to nonsensical measures like this. A oft-repeated criticism of homeschooling is that kids "won't learn to socialize". That criticism does not hold water when compared to today's public school environment.