For starters, remove the mandatory reporting rules for psychiatrists. Currently, if a patient tells a psychiatrist that he has pedophile tendencies, the doctor is bound by law to report him to the authorities. This causes all of the pedophiles who don't want to be pedophiles to not seek treatment, increasing their risk of actually offending.
I don't think the mandatory reporting rules (generally) require reporting for tendencies. I think the common rule is a report has to be made if there has been contact with a child. Of course, pedophiles are so vilified that I can't imagine too many are knocking on therapists' doors asking for help. And those that do certainly aren't advertising it.
It does, but most states/countries have some exception. For example, here in Australia a psychiatrist has to report someone they think is going to cause harm to themselves or others.