Bloggers and web board admins are not legally responsible for content posted by their readers or users.

The First Circuit Court of the USA has upheld an important dictate of the Communications Decency Act, which sets a helpful precedent for bloggers and people who run web BBSes. Section 230 of the CDA states that the administrators of public forums which allow people to post are not, in fact, responsible for what their readers or users post. The court case this comes from is Universal Communication Systems v. Lycos, in which people unknown were talking smack on UCS' stock prices. UCS decided to sue Lycos for running the board and not the users of the board (which they probably couldn't find), but the case was thrown out of court.