For anyone who takes the time to look at just a few declassified documents on the CIA or FBI website, or the Edward Snoden files, or Wikileaks, one soon realizes how many 'conspiracy theories' - even the most crazy sounding - are actually true. I was blown away to see an actual NSA document on Wikileaks detailing that the Samsung F series TV's actually have hidden have microphones in them for purposes of spying on us.
Then there are some people who would just rather live in ignorant bliss and will even make up bizarre lies to keep from changing their false beliefs or learning that they were wrong. These people get all their info from TV, newspapers and Wikipedia but most of them never seek to learn or question because they think they already know it all. The people in this group quickly identify themselves and get angry when I start talking about the facts of 9/11 or other scandals and they start arguing nonsense about magic bullets and just repeating what they've been told.