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Anybody can alter wiki contents, and I am wondering "How does Wikipedia prevent spamming?", when even not registered members edit the contents. What you think about it?

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3 Answers 3

up vote 7 down vote accepted

Crowdsourcing

Wikipedia has many editors, each editor is usually subscribed to change notifications of the article they created/edited during their Wikipedia activity life span. When you make an edit, one of the editors reviews it and if it's spam he will revert the change to the article previous state.

Wikipedia relies on people to filter out the spam, you can do this too by going to the history tab.

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Great, Thanks for the information. –  Ashok KS Jan 10 '12 at 9:31
    
@AshokKS: If my post answers your question please mark the topic as "answered" by clicking the "V" –  Maxim Veksler Jan 10 '12 at 10:22
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From their About page on abuse:

Handling disputes and abuse

Wikipedia has a rich set of methods to handle most abuses that commonly arise. These methods are well-tested and should be relied upon.

  • Intentional vandalism can be reported and corrected by anyone.
  • Unresolved disputes between editors, whether based upon behavior, editorial approach, or validity of content, can be addressed through the talk page of an article, through requesting comments from other editors or through Wikipedia's comprehensive dispute resolution process.
  • Abuse of user accounts, such as the creation of "Internet sock puppets" or solicitation of friends and other parties to enforce a non-neutral viewpoint or inappropriate consensus within a discussion, or to disrupt other Wikipedia processes in an annoying manner, are addressed through the sock puppet policy.

In addition, brand new users (until they have established themselves a bit) may at the start find that their votes are given less weight by editors in some informal polls, in order to prevent abuse of single-purpose accounts.

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Users can also create programs called bots that help automate dealing with spam and vandalism.

Here is a list of bots and what they do. Some users publish the code for their bots.

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Thanks for the answer, this helps me lot. –  Ashok KS Jan 13 '12 at 6:17
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