It seems to have become one of the most popular ways of ridiculing somebody’s argument or position, calling into question someone’s sanity or even somebody’s right to their very own existence in recent years are "You’re a conspiracy theorist!","That sounds like a conspiracy theory to me!" The definition of conspiracy insists on the “evil, harmful, bad” side of things. In other words; in the English language, it is impossible to conspire to do good. Here however are some alternative definitions of “conspiracy theorist”: someone who has seen through the bullshit; and/or someone who questions the statement of known liars.
http://www.zerohedge.com/news/2016-07-10/theory-conspiracy-theorists