They- the WT- does occasionally have "campaigns"... to "reach out" and "help people come back into the truth" to satisfy their conscience that they have "done all they can" and "now you know how nice and loving they are.'
I would not be outspoken to them... just blah, blah, blah them along. and disappear. Give them nothing... yes, it can be used against you to get you DF'd, disassociated, and then separated from your fam', maybe -as JWdaughter said- to keep you out of the will.... as NOWadays, "you can give everything to the Society when you die, and their lawyers will help you write your will for free!
Take care, be careful!