The first point is interesting, but it relies on another, undocumented a posteriori cause: that the contraceptive pill became legal after Roe v. Wade about twenty years ago, and there was a marked and significant drop in unwanted pregnancies, the babies of which would now be prime crime-commiting age. (This was actually documented in a year-on-year fall of about 5% (iirc) exactly seventeen years after the court ruling.) :D
Regarding point Five, again, this is correct; other studies show that children learn different, and unpredictable, things from the same lesson. Try it with a class of school pupils: teach them a new mathematics technique, say, and then test them to see what extra knowledge the children actually have afterwards.
Good article.
Regarding the second point, Henry Jenkins is quite correct (remember that last link about violence in video games, when the leading study was quoted?) that there is no causal relationship. When you read this point in concert with point Eight, it is possible to understand the danger implicit in your misapprehension.