A lot of what is written off as 'conspiracy theory' is actually conspiracy FACT. When you talk about valid things going on, people want to try to bring in the outlandish theories such as reptiles and aliens to discredit the valid elements of it all.
When you have a right wing president in Reagan and a left wing economist in Paul Krugman both talking about the need for a 'ufo invasion' to help unify mankind, then you know something is going on. When you have Dimitri Medvedev holding up a coin with the words 'unity in diversity' in English and Timothy Geitner talking about being open to a world currency, you know something is up. When you have the Patriot Act extended, busses installing microphones to monitor our conversations, the government archiving our emails in bulk, and drones that can be retrofitted with weapons flying overhead in our cities with more authorized, you know something is up. When you have body scanners appear in airports the NEXT DAY after the 'underwear bomber', then you know something is up.
I can easily go on and on, but everyone will believe what they will believe.