I fully agree with the general sentiments expressed on this issue by yekke, sirvoddmort, DY and NeutiquamErro.
wian: The answer to all three of your questions is no. They should be reported only to beis din which may (or may not) have a partial remedy as far as compensation being due to the victims. Any other remedies would be in Hashem’s hands. I am assuming the basis for all three of your cases is that there’s no chance of re-offending.