They'll be around for a long while yet.......there's been wackier religions than ours that have survived hundreds or even a thousand years or more (Islam's been around for about 1300 years and you can't get a screwier religion than that!)........
There's too many 'yes' men and women within the Borg who are quite content the way things are and don't like to have their perfect little world disturbed. Even with the whole pedophile thing; I'm sure many Witnesses at first were horrified and their faith shaken, but as soon as the word came down from the Tasteless & Indiscreet Goat Class, that it was all lies, lies, and more lies from apostates, the media and Satan himself, then they could all breath a sigh of relief and go back to living in their dream world.
As long as there's people who let others do their thinking for them, this religion will continue on.