Clearly leaving a child unattended is going to have an effect, and so are many other factors going to have an effect on admission to Harvard.
Furthermore, the hand waving statistics are off by an order of magnitude as far as I can tell. 40 * 700 = 28,000, but the cohort of births in a given year result in a student body closer to 2,800 than 28,000.
It probably came from comparing accept percentage of Harvard (6% now but 7% a couple years ago) with a kidnap chance calculated for the whole of children born in the US. Of course applicants are already a selected subset and not representative of all candidates born in the same year. It's a pretty useless comparison.
e.g. 40 kidnaps per year for 10 years = 400. 400 * 700 'times more likely' = 280,000. Divide that by 4mil children born in a year to get 7%.
Furthermore, the hand waving statistics are off by an order of magnitude as far as I can tell. 40 * 700 = 28,000, but the cohort of births in a given year result in a student body closer to 2,800 than 28,000.