Mobile phone spam
Mobile phone spam is directed at the text messaging service of a mobile phone. This can be especially irritating to customers not only for the inconvenience but also because of the fee they may be charged per text message received in some markets. The term “SpaSMS” was coined at the adnews website Adland in 2000 to describe spam SMS.
Online game messaging spam
Many online games allow players to contact each other via player-to-player messaging, chatrooms, or public discussion areas. What qualifies as spam varies from game to game, but usually this term applies to all forms of message flooding, violating the terms of service contract for the website.
Spam targeting search engines (spamdexing)
Spamdexing (a portmanteau of spamming and indexing) refers to the practice on the World Wide Web of modifying HTML pages to increase the chances of them being placed high on search engine relevancy lists. These sites use “black hat search engine optimization techniques” to unfairly increase their rank in search engines. Many modern search engines modified their search algorithms to try to exclude web pages utilizing spamdexing tactics.
Blog, wiki, and guestbook spam
Blog spam, or “blam” for short, is spamming on weblogs. In 2003, this type of spam took advantage of the open nature of comments in the blogging software Movable Type by repeatedly placing comments to various blog posts that provided nothing more than a link to the spammer’s commercial web site. Similar attacks are often performed against wikis and guestbooks, both of which accept user contributions.
Spam targeting video sharing sites
Video sharing sites, such as YouTube, are now being frequently targeted by spammers. The most common technique involves people (or spambots) posting links to sites, most likely pornographic or dealing with online dating, on the comments section of random videos or people’s profiles.
Another frequently used technique is using bots to post messages on random users’ profiles to a spam account’s channel page, along with enticing text and images, usually of a suggestive nature. These pages may include their own or other users’ videos, again often suggestive. The main purpose of these accounts is to draw people to their link in the “home page” section of their profile.
YouTube has blocked the posting of links but people can still manage to get their message across by replacing . with “dot”; for instance, example dot com instead of example.com.
Another form of such spam is posting a message which claims to elicit an occurrence, such as an easter egg, the loss of a loved one, or being haunted by a ghost, unless a demand is met, mostly copying and pasting the message to post a certain number of times within a time limit (i. e: “Post this in 5 videos in an hour or you shall die). Such a post targets the gullible, but those who see past usually respond with derision. Some sites have a feature which marks a post as spam or a rating which blocks unwanted comments (with the intent that spam posts garner a low score.)
Source : wikipedia