There are lot of websites which are fully or partially clone of ODP (Open Directory Project).These websites or part section of websites, which are using ODP script to reformat the data on there site are useless and they have no original new contents. It is learnt that search engine specially Google is purging or banning such kind of sites. Why search engines are against Dmoz clone sites? Is the data in them not worthwhile or are they been misused by site owner's? We will try to find our reason, but before that let us first understand all about Dmoz Directory