Blogs, often treated as the equivalence of online personal diaries, have become one of the
fastest growing types of Web-based media. Everyone is free to express their opinions and
emotions very easily through blogs. In the blogosphere, many communities have emerged,
which include hate groups and racists that are trying to share their ideology, express their
views, or recruit new group members. It is important to analyze these virtual communities,
defined based on membership and subscription linkages, in order to monitor for activities …