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Set nofollow on links in Markdown content
To disincentivize spamdexing, links in user-generated content should be disavowed by annotation with `rel="nofollow"` attributes: - https://en.wikipedia.org/wiki/Nofollow Automated spam has already targeted OSEM in the wild: - SeaGL/organization#274 Ideally link annotation would be performed during Markdown rendering or a single sanitization pass, but this is currently an unresolved issue: - vmg/redcarpet#720
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