For me telling the truth was a simple but somewhat difficult decision. I knew the organization wasn't true and felt disgusted with myself for pretending, for going along with the scam. I knew this was a nightmare that had to end.
I possessed absolute zero uncertainty of the truth about the organization and one morning I told my TBM wife I was never going back to church. Prior to that I had been dropping the usual hints "This doesn't make sense to me - what do you think?" type of dialog but I was always, always shunned and nearly abhorred for thinking outside the steel metal box of strict mormon theocracy. So, I just told her - the first Thursday morning in October a few years ago (four?).
Yes, of course it's been hell at times since I told her that but I have never
regretted telling her - never. My only regret was waiting so long to do so.
Sure, the wake of destruction (ha) following my decision was not easy but in retrospect, those uncomfortable situations and feelings were absolutely nothing compared to the constant inner anguish I experienced by pretending to be part of something I knew was wrong, an institution that clearly cheated and lied to me.
I still loathe the organization and have no respect for those who control it - none. The men comprising the Q15 boldly claim their false priesthood and authority while making no apologies as they rape the minds of their victims and hold hostage their follower's abilities to think reasonably, while they continue to demand the total financial, time and emotional resources of their followers. Greedy only begins to describe the Q15, the propagators of deceit.
Do it - tell them all - eventually, they may embrace truth and become like you, cherishing your bold and noble effort to be honest and set an example for them to follow. Most likely, and depending on your story explaining why you are leaving (the truth about the organization was discovered) your TBM family members will continue to choose to follow the organization because the pressures are in place to keep their temple covenants "or they will be in Satan's power." Ya, exactly how a true and loving god would coerce - er, I mean lovingly encourage - his children to follow.
Sorry to ramble - it's therapeutic for me.