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This type of spam originally appeared in internet guestbooks, where spammers repeatedly fill a guestbook with links to their own site and no relevant comment, to increase search engine rankings. If an actual comment is given it is often just "cool page", "nice website", or keywords of the spammed link.
In 2003, spammers began to take advantage of the open nature of comments in the blogging software like Movable Type by repeatedly placing comments to various blog posts that provided nothing more than a link to the spammer's commercial web site. Jay Allen created a free plugin, called MT-BlackList,[1] for the Movable Type weblog tool (versions prior to 3.2) that attempted to alleviate this problem. Many blogging packages now have methods of preventing or reducing the effect of blog spam, although spammers have developed tools to circumvent them. Many spammers use special blog spamming tools like trackback submitter to bypass comment spam protection on popular blogging systems like Movable Type, Wordpress, and others.Other phrases can be stolen comments, "nice article", something about their imaginary friends, stolen parts from books, unfinished sentences, nonsense words or the same comment.Possible solutionsDisallowing multiple consecutive submissions It is rare on a site that a user would reply to their own comment, yet spammers typically do.[2] Checking that the user's IP address is not replying to a user of the same IP address will significantly reduce flooding. This, however, proves problematic when multiple users, behind the same proxy, wish to comment on the same entry. Blog Spam software may get around this by faking IP addresses, posting similar blog spam using many IP addresses.[3]
Blocking by keyword
Blocking specific words from posts is one of the simplest and most effective ways to reduce spam. Much spam can be blocked simply by banning names of popular pharmaceuticals and casino games.{{Citation needed|date=September 2012}
In 2003, spammers began to take advantage of the open nature of comments in the blogging software like Movable Type by repeatedly placing comments to various blog posts that provided nothing more than a link to the spammer's commercial web site. Jay Allen created a free plugin, called MT-BlackList,[1] for the Movable Type weblog tool (versions prior to 3.2) that attempted to alleviate this problem. Many blogging packages now have methods of preventing or reducing the effect of blog spam, although spammers have developed tools to circumvent them. Many spammers use special blog spamming tools like trackback submitter to bypass comment spam protection on popular blogging systems like Movable Type, Wordpress, and others.Other phrases can be stolen comments, "nice article", something about their imaginary friends, stolen parts from books, unfinished sentences, nonsense words or the same comment.Possible solutionsDisallowing multiple consecutive submissions It is rare on a site that a user would reply to their own comment, yet spammers typically do.[2] Checking that the user's IP address is not replying to a user of the same IP address will significantly reduce flooding. This, however, proves problematic when multiple users, behind the same proxy, wish to comment on the same entry. Blog Spam software may get around this by faking IP addresses, posting similar blog spam using many IP addresses.[3]
Blocking by keyword
Blocking specific words from posts is one of the simplest and most effective ways to reduce spam. Much spam can be blocked simply by banning names of popular pharmaceuticals and casino games.{{Citation needed|date=September 2012}
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