You mean such as Dan disciples, McClown cart followers, unelected ‘experts’, bureaucrats and large sections of the media?
Again if you get all your information from one source you are now at the mercy of their bias and direction.
One tool you are given to deal with mental health issues is to be rational about information, make sure it agrees and is consistent with reality. If your information is at odds with what is actually happening then you are suffering an episode, being fooled. Now that can be easy to deduce through grounding or might be hard depending if you are surrounded by influences feeding the delusion. Basically check information provided to you, refer to different sources and see if it makes sense relative to what is actually happening and ask for trusted opinions from people relevant to the situation. If it's just isolated information highlighting some conspiracy then it's most likely bogus/fake, especially if fed through anonymous sources. Also look for highly edited or out of context interviews or snippets of data, without seeing the actual study it refers to, half truths are the easiest to make convincing.