The reason you gave for homeschooling your son is actually not the most common. Most often homeschooling in America is primarily motivated out of fear and/or religion (see links in my post). Initially coming from a position of ignorance on this issue, my guess was that the quality of education would be the most common.

Otherwise, I guess my response to this episode can be summarized as “I applaud your dedication to your kids’ education, but would ask you to consider the ill side-effects on the wider society.”