As example Anderson v Watchtower shows that df'ing is a matter that secular courts cannot intereve
Yes, and some df individuals sue the wt anyway, even after being advised of case law, and wt must answer the summons and complaint - defend - and go to Court if they widh to pursue and that costs both wt and plaintiffs money. But wt has not been found doing anything illegal or held liable by dfing someone.
First, in many states the breaking of the mandatory reporting statutes is a criminal matter and does not rise a civil cause of action. In PA the statute calls for the violation of the mandatory reporting as a misdemeanor with a possible sentence of up to 1 year in prison and/or up to a 1000 dollar fine.
That is correct and had the Defendants violated the statute in the Fessler case, they would have had to answer criminal charges but that was not the case.