My parents are over 60 and to be honest they are better off inside the Cult than outside... getting them out will only benefit ME but not them.
Cyber makes an important point. Had this same discussion with my non-JW sister...our parents are in their 60s, been Dubs their entire lives. I think they live a miserable life but removing them the Org now...well, I just don't know how they'd fare. At their age, I can't imagine the emotional and mental repercussions if the blindfold was removed.
As for actively trying to "take down" the WT....its just not for everybody. I want those bastards to fry as much as anyone else. But some need to move on and away to heal. Then there's some who have moved on and healed, and then dedicate their time and energy to bringing down the Org and helping others. I admire these ones greatly - thinking of ones like cantleave, MadSweeney, Lady Lee, leavingwt, etc. There's many others, but those came to mind.