Quote Originally Posted by mojo
If you're talking dozens of people... the odds go way down.
It depends who those people are. If those in on the conspiracy have too much to lose by opening their mouth, they're more likely to keep quiet than, say, a civil servant who stumbled upon the conspiracy. And if you're an all-powerful covert political-military agency, which is what you need for a conspiracy on the scale of 9/11, then disappearing people who know too much can have a knock-on effect where others who also know too much don't want to draw attention to themselves. True fear. And the worst thing that can happen is you grow a pair of massive balls, say "fuck it", tell the world, and nobody believes you, you just become a lunatic fringe conspiracy theorist and eventually they'll get you when everyone has forgotten about you.

If I knew Boris sold cocaine to my mate, I'd probably sell that story to the papers, but if I could literally prove that 9/11 was an inside job, I'd be terrified of the information I possess and would be concerned for my family.