Another problem with most if not all conspiracy theories is that eventually too many people have to be in on it for it to work, and far too many of the necessary people will have actual interests that run counter to the conspiracy.
I had a couple of these in my office. A child died of an infection, but a bereaved parent claimed the child was killed in a Satanic ritual and everyone from the ambulance crew to the hospital staff, medical examiner, and various county and state government officials were part of the conspiracy and cover up. Another time, a guy who was divorced after a 20+ year marriage claimed that her attorney bribed his attorney, the judge and the court reporter to throw the case. I knew these people, and found it preposterous. But I also looked up the case record; her share of the marital estate was only a few hundred more than his, meaning that the law which presumes an even split of assets wasn't perfectly met but it was darn close--so all that career-destroying and prison-earning bribery got her an extra living room chair? Once the conspiracy theory spreads beyond one or two people, common sense should kick in.
