Comment spam is a term referencing a broad category of spambot or spammer postings which abuse web-based forms to post unsolicited advertisements as comments on forums, blogs, wikis and online guestbooks. Related topics include:
Forum spam, posts on Internet forums that contains related or unrelated advertisements, links to malicious websites, and abusive or otherwise unwanted information
Newsgroup spam, a type of spam where the targets are Usenet newsgroups
Social spam, unwanted spam content appearing on social networks and any website with user-generated content
Spam in blogs, a form of spamdexing done by posting random comments, copied material, or promotion of commercial services
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