Abstract: Users may be protected from scumware included on or associated with web sites indexed by a search engine. The search engine may, for instance take the presence of scumware into account when ranking or determining whether a document matches a search query or provide information with search results that indicates that a particular search result link may be associated with scumware. In one implementation, a search engine generates search results for a search query to obtain documents that are relevant to the search query. The search engine may then format the search results as a web page that includes visual indicators associated with those of the relevant documents that have been determined to be associated with scumware.