I will probably get flamed for this response but people come at this from the wrong angle. If a person can confess to a Priest with annonimity there is far more chance he will do so and therefore be in the position at least to be counselled and helped. That help may/should, in child abuse cases be to escort the perp (of their own free will) to Law enforcement or there can be no absolution.
Take the seal away and do you really think these people will then approach a Priest - the sin will remain unconfessed the person will more than likely go on offending and more kids will be hurt.
Mel
Anyone recall having to identify yourself before going in to a Confessional?