I believe people who pray on children should face the charges in court and go to jail. They should also be entered on the sex offender registry. The fact that these clergy members have avoided this fate is troubling to me and I think its a grave disservice to the children who were affected.
Another way of stating this question would be: should a member of the clergy be treated differently than anyone else if they are accused of sexual abuse? When viewed in this light, the answer is clearly "no." Any person who commits sexual abuse should be prosecuted, regardless of their profession.
Yes, there should be mandatory prosecution of clergy in sex abuse cases. How could there not be?!? Regardless of the religion, if a member of the clergy sexually abuses someone (adult or child) then they have not only violated their faith but they have violated the actual law. There should be no sex abuse case that is ever handled 'internally' or kept quiet to save face for the religious organization. If anything, clergy should be held to a higher standard than normal citizens as they are given authority and inherent trust by those in their church and therefore the crime is exponentially more heinous.
Everyone, even and especially clergy, should be responsible for their actions and should be prosecuted to the full extent of the law. The clergy's victims of sex abuse deserve no less justice than any other victim of sex abuse. The church should be mandatory reporters of sex abuse allegations, even then the accused is one of their own.