Dont really agree with this! I have yet to see a controversial post or a personal attack on an individual on here.
Dont you have to have a valid email to join / register, which is known to the Webmaster? This can then be policed by the webmaster if there are any personal or bad comments made. The webmaster can then name and shame if required.
Does your email then become public. THis can be an issue for the younger members I think?