Type of Spam

Spam in blogs

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 all instances of a period with the word "dot." For instance, typing out example dot com instead of example.com bypasses the filter set in place. In addition, YouTube has implemented a CAPTCHA system that makes rapid posting of repeated comments much more difficult than before, because of abuse in the past by mass-spammers who would flood people's profiles with thousands of repetitive comments.

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 by copying and pasting the message a certain number of times within a time limit. A prime example is as follows: "Post this in 5 videos in an hour or you shall die." Such posts target the gullible, but those who are more familiar with them usually respond with derision or simply ignore them. Some sites include a feature that allows users to mark certain comments as spam or rate unwelcome comments with a low score, with the intent that spam posts will receive a negative rating.
Yet another kind is actual video spam, giving the uploaded movie a name and description with a popular figure or event which is likely to draw attention, or within the video has a certain image timed to come up as the video's thumbnail image to mislead the viewer. The actual content of the video ends up being totally unrelated, sometimes offensive, or just features on-screen text of a link to the site being promoted.

Others may upload videos presented in an infomercial-like format selling their product which feature actors and paid testimonials, though the promoted product or service is of dubious quality and would likely not pass the scrutiny of a standards and practices department at a television station or cable network.

Source : www.wikipedia.com