I don't think they are cracking down at all. They are self reported.
I'd venture to say they "self reported" in the same way that Andy Petite and every other major leaguer who new he was caught up "self reported" their steroid use.
no program is outing themselves and potentially losing a recruit unless they know there is no other option.
you can spin it as "integrity" all you want, but you're only fooling yourself