Although [men and women] are on average the same, the people at the very top and the very bottom of the IQ bell curve are more likely to be men.
This is wrong. What the article intends to say is that people at the very ends of the bell curve are more likely to be men. People at the top are more likely to be women.
Of course, there's more very stupid men, which is reflected in crime rates etc.
This is oversimplified. I wouldn't be surprised if even more intelligent men commit more crimes than average-intelligent women, since crime rates are associated with a bunch of other factors like aggression.