9. The method of claim 1 , further comprising: repeating the score assigning step for each of the at least particular one of the plurality of documents, for each of a plurality of topics.
9. The method of claim 1 , further comprising: repeating the score assigning step for each of the at least particular one of the plurality of documents, for each of a plurality of topics. 13. The method of claim 9 , further comprising: determining for each document a factor that is nominally indicative of whether that document is spammy, including considering topic scores for each document, across a plurality of topics, relative to a link popularity measure for that document.