r9etb doesn't sound like a plant to me; he sounds sincere. Perhaps he does know some homeschooling parents who are over-protective, and he is projecting their behavior onto the rest of us. Once he go into the discussion, his pride prevented him from considering that he may be mistaken. Also, a lot of otherwise intelligent people glom onto the NEA talking points, without having thought the issue through.
The thought of a little NEA-inspired intrigue does have its charm, though.