How do open source companies avoid harmful contributions and find the useful ones?

Posted by hory.incpp on Stack Overflow See other posts from Stack Overflow or by hory.incpp
Published on 2010-03-14T22:52:15Z Indexed on 2010/03/14 22:55 UTC
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open-source

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contribution

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wikipedia

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security

Because wikipedia is open source, I can modify anything I want. But what happens if someone deletes, adds bad content, modifies useful content ? What does wikipedia do to prevent that ?

The last question is available for any other open source software: linux, php etc. How do they know which contribution is useful and which is harmful ? Thank you.

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