From people working together to "game" the system to get their friend hired to criminals working together to break the law, we're surrounded by conspiracies on a daily basis; but large scale conspiracies are unlikely to be true.
With each additional person you add to a conspiracy the likelihood of your conspiracy being discovered increase dramatically, and conspiracies involving more than a couple dozen people become nearly impossible to hide. Once you have a conspiracy that is large enough the challenge becomes to protect the conspiracy because information is bound to be released and this will be used to try to shut the conspiracy down.
Conspiracy theories that involve thousands of participants are strictly the domain of fiction ...







