There's also the fact that the kid who is enough of a dope(/trusting/rule and authority abiding) to not know he can lie on the form is also the most likely to b

There's also the fact that the kid who is enough of a dope(/trusting/rule and authority abiding) to not know he can lie on the form is also the most likely to be victimized by adults online. This is a similar selection effect to misspelled Nigerian prince emails, so I'd say it's a pretty good mechanism actually.