In addition to being a violation of the religious freedom of Catholics, such a move would be self-defeating. If penitents knew that their confessions of abuse would be reported, they would simply not go to confession. The end result would be that the truly penitent would be deprived of the sacrament while there would be no new confessions of abuse to report to the police.
Or just go to a behind-screen confessional in a parish where their voice isn't known.