some are pure bull, but it's very innocent of people to think that there are no conspiracies happening in the world at all. I believe in some theories. I wouldn't go as far as world domination, reptilians or illuminati, but I sure believe on some things related to the Bush administration, 9/11, Iraq and Afghanistan. There are a lot of evidences supporting those claims.
Also, on a smaller scale, there are dozens of conspiracies happening here in Brazil all the time related to corruption, politician cartels who steal literally billions from the nations tax payed reais. These aren't even shadowy things, it's reported on the news all the time.