|This page is an essay, containing the advice or opinions of one or more Wikipedia contributors. Essays are not Wikipedia policies or guidelines. Some essays represent widespread norms; others only represent minority viewpoints.||
|This page in a nutshell: Accusations against other editors should not be made in the absence of any value in doing so|
A witchhunt is an action taken by a Wikipedia editor to find fault or violations in another editor when it is not already obvious that such has occurred. It is a lack of assumption of good faith and should generally be avoided.
Some editors may be concerned that another's activities may not conform to Wikipedia guidelines, and may become so obsessed with that possibility that they go to the extremes of studying the edit histories of others very deeply as if they were detectives conducting a homicide investigation. One who engages in this type of behavior misses the point as to what Wikipedia is really all about.
The purpose of Wikipedia is to provide the world with an encyclopedia from which anyone can obtain free knowledge. It is a place for teamwork, where the goal is for everyone to work together for the best possible results. It is not a place to fight for superiority over others, to be a bully, or to seek to accuse others of things.
So you are considering getting another editor "in trouble" for something. Be aware, action that is taken against editors is not punitive. The only purpose of blocking, banning, and other sanctions is to protect the encyclopedia from harm. It is not to "punish" the offender for their wrongdoing. So if you decide to engage in some witchhunt, just be aware that even if perhaps an editor did violate some policy, what is taking place against them is not a prosecution or trial. Any discussions being held are only for the goal of improving the quality of the encyclopedia. So if an editor maybe did break some rule, but has mostly spent their time doing good things, do you really want to stand in their way of their worthwhile contributions and make them unable to edit for a period of time?
Examples of witchhunts
The following are some examples of witchhunts.
Deletion of articles
There is an article up for deletion. Everyone agrees it is a "bad" article. A witchhunt would be to look at the creator's edit history to find other articles the creator may have created, and to see if they should be proposed for deletion as well.
It is suspected that two accounts may be operated by the same person or by two people who know each other. Both accounts have a history of making good-faith contributions. A witchhunt would be to examine the contribution histories of both accounts and to look for signs to see if sock puppetry could be occurring.
An act of vandalism has been reverted and the vandal has been warned. It would be a witchhunt to look into the contribution history of the vandal to look for more disruptive behavior other than the vandalism of that article.
Repeat vandals can easily be identified by the number of templates on their talk pages, so there is no need to look any farther. Most vandals use IP address, so if the IP changes, it is difficult to trace them. If vandalism persists outside of a single IP, additional steps used to fight it will include range blocking and article protection. If the latter becomes necessary, it'll probably occur because multiple people in different locations were vandalizing, so a witchhunt will not help.