Libertarians get a bad rap where conspiracy theories are concerned. But that's not very honest. The entire political and philosophical landscape is filled with conspiracy theories.
People from the "left" and the "right" love to dismiss the views of libertarians by calling us "conspiracy theorists"- and some libertarians are- but I've noticed that libertarians aren't the only ones with their own brand of conspiracy theories.
"Conservatives" and "liberals" each have their own particular types of conspiracy theories they spread endlessly.
I'm sure that is you have a variety of people in your circles you have been exposed to some conservative conspiracy theories and some liberal conspiracy theories.
"Conservatives" love their theories about different religions taking over "Our Country", about "other races" being given special status that allows them to get away with crimes, and other things that threaten "traditional values".
"Liberals" love their theories about "The NRA", rich guys ("The Koch Brothers") influencing political policies, and "conservatives" rewinding science and the rights of "others" back to the Dark Ages.
And, yes, both fears have some basis in truth. Which makes it stupid to "run" the world by the political method.
Yes, there ARE conspiracies in the world. Anytime two or more people plot to gain power, "authority", or property by fooling or scaring people into giving them what they want (or when they simply steal it for themselves) you have a conspiracy.