Suggestions for New Forum Users

[SomeUser]

Text content is minimal, usually innocuous and unrelated to the forum's topic, or in a very old thread that is revived by the spammer...

http://en.wikipedia.org/wiki/Forum_spam

but instead of spambots...

Human-posted spam has been on the rise for some time. Low-paid workers are hired by “SEO” firms to post comments on blogs and forums...

http://blog.akismet.com/2010/04/22/state-of-web-spam/