Staying in touch with reality is not an easy job for anyone.  It is so easy to get swept up in the moment by a bandwagon propagandist, or come to think something magical has happened by a skilled fraud using magic tricks, or come to believe things because the advocates play with the evidence and don't tell the whole truth (this is what religions do), or come to accept some nostrum from so much hoping it is true (wishful thinking) or even something simple like not wanting to be the odd man out in a group of believers and then have them turn on you with name-calling, such as "skeptic" (a title of honor in my mind).

Maybe one of the easiest ways to get out of touch with reality is to think that there must be truth (if there is smoke there is fire) of some sort in everything -- that the middle way between belief and disbelief is best -- no so, folks.  Belief must not happen and opinion assent happen only with good evidence.

Of course there is also just plain old insanity -- you know -- craziness, lunacy, paranoia out your ear, etc.