Blogs, like all Internet technology, are also subject to the
spam problem. With blogs the problem is rapidly growing out of
control. Blogs are being created by spammers with the sole purpose
of influencing search engines. Google is rumored to have a "sandbox"
that websites get stuck in for a month or even longer just to thwart
spam blogs and websites. Technorati is apparently under siege from spam blogs. A NewsTarget.com article says:
Between 30,000 and 40,000 new blogs are created every day according to
Technorati, and a large part of that growth is due to the creation of
"spam blogs" -- blogs which have no legitimate content, but instead
are simply random text that contain links to a real blog or page in
an attempt to drive up the search ranking of the linked site.
As with all kinds of spam problems one can only expect that blog spam
will get much, much worse before it gets better.