I wouldn't say it's specific to the Libertarian community.

For example this is from a 2016 You.gov poll:

• The financial crash of 2008 was secretly orchestrated by a handful of Wall Street bankers.
  Absolutely True by affiliation: Dems:12% Reps: 10% Other: 5%
• Russia hacked the email of Democrats in order to increase the chance that Donald Trump would win the Presidential election.
  Absolutely True by affiliation Dems: 47% Reps: 2% Other: 9%
• Leaked email from some of Hillary Clinton’s campaign staffers contained code words for pedophilia, human trafficking and satanic ritual abuse - what some people refer to as ’Pizzagate’.
  Absolutely True by affiliation Dems: 4% Reps: 11% Other: 5%

Additionally, many of these "conspiracy theories' turn out to be completely true but conspiracy theorists are looked at as tin foil hat wearing crazies until the lamestream media jumps on the wagon.

Examples:

• Mk Ultra
• Big Brother state : See Edward Snowden
• The falsified Nayirah testimony which sparked American involvement in the Gulf War
• Gulf of Tonkin incident which escalated American involvement in Vietnam revealed as false in 2005.
• Operation Northwoods proves the government purposefully brainstorms ideas to perpetuate war. Thankfully rejected by JFK.

I would say looking into conspiracy theories is more the product of being a free thinker. When I see something that doesn't look right I keep my mind open to the possibilities. If we didn't investigate then we are just being irresponsible to humanity.