Because edits by just a few users can cause a question or answer to become community wiki, removing all rep from questions/answers that become community wiki will not work. All you would need is a cabal of 4 people who agree to edit all or some significant fraction of a person's answers and/or the questions that a person has answered and you'd remove most or all of their rep. Even in the absence of nefarious conduct, legitimate questions can become community wiki simply by being around long enough to be edited by several people or because you've taken the trouble to keep it up-to-date. Losing rep because a question gets edited into community-dom is worse than the problem the solution attempts to correct.
How does a post become a Community Wiki post?
There are several ways a question or answer can enter community wiki mode, and most of these ways will occur automatically based on the rules of the system.
Posts enter community wiki mode when:
- The body of the post has been edited six times by at least four different people.
- The post has been edited eight times by the original owner.
- The post's author checks the community wiki checkbox when composing the question or answer.
- The post is edited by its original author, who when doing so opts to check the community wiki.
- The question generates more than 30 answers. In this case, the question and all answers will enter community mode, as will any future answers.