Dutchie,
I know that you are involved in the legal world, so I will bow to your greater knowledge in this field.
I think that one of the most easily 'provable' charges that could be legally leveled against the WTS, is on the grounds of mental cruelty for having been disfellowshipped. This has been tested in the Courts a number of times in different countries around the world. The WTS has won each case that it fought on these grounds..
They successfully defended themselves on the 'You knew what to expect when you joined' strategy, and it worked. Their remodeling of the Baptism slogans solidified their legal position even further. Fighting individual cases will be fraught with difficulty, the vast majority of cases being lost before the matter gets anywhere near the Courts due to the accusatory parties being unable to pay the legal bills. People have lost houses, businesses and in many cases their health in the process.
What is needed is ten Barbara Andersons in a class action against the WTS, supported financially by persons who are willing to go to the wire over the case. This would catch the news, guarantee a strong legal team, and most certainly imho, give the WTS a run for its money.
Another recourse would be to unearth a paper trail that leads directly to the GB and implicates them in a deliberate criminal act, these exist and it may be a long time coming, but it also may not!
Best regards - HS