Just like how the Comet Pizza conspiracy theory should be taken seriously even though it's kinda silly- it becomes dangerous when people start shooting up restaurants looking for non-existent children in a non-existent dungeon
Jim Jones was not a conspiracy theory. It was a real belief system. By admitting the existence of the beliefs, we don't automatically recognize correctness. So why should QAnon be flat out labeled as a conspiracy theory when its existence as real as Jim Jones?
Well, we do know that someone or a group is making those Q posts. That is factual, indisputable. Digital signatures on anonymous messaging boards work. So I'm confused as to why the article never mentions the Q posts.
They even misrepresent what it is: "QAnon can be confusing for the outside observer." Actually, it's quite clear: a person or group who identified as "Q" started posting that a bunch of stuff is going on behind the scenes.
Whether or not Q is truthful or not is not the problem. The Vice article doesn't represent the origin of the QAnon "movement" correctly.
Q validates their posts with what's called a trip code. Urban Dictionary actually explains it pretty well:
"A trip code is a code used in anonymous threads like 4chan to determine whether or not the anonymous poster is authentic or not. It assigns a code to the end of your name. When you add the pound (#) symbol to the end of your name followed by a word, like a password that only you know, it scrambles the word into a code. That way it's undetectable and can be used over and over again." [1]
As long as you keep your password secret, trip codes are quite reliable.
Now, Q has apparently changed tripcodes over time. A good resource for looking at Q posts is qmap.pub. I just did some searching to find out how Q does these changes.
This is just one example, but the poster claiming to be Q (1) says a change is coming and (2) announces the change. It's clearly imperfect, but the old trip code isn't used again. I would have to look at all other trip code changes to be certain. However, there's no reason to automatically assume other trip code changes would be different than this.
Here's a big weakness: Q didn't use trip codes at first. Ultimately, you have to believe that the Q today is the same as the one from 2017. However, the chain of trip codes does demonstrate at least some continuity for the last two years or so.
Sources:
[1] https://www.urbandictionary.com/define.php?term=Trip%20Code