Yesterday, we reported on Google Sidewiki which allows anyone to basically comment on your site, on your site, with the Google Toolbar. Some webmasters are not into this idea and they want to know if there is a way to opt out of this feature. The answer is no, not an official way to opt out, but you can block these users completely.

One Webmaster in Google Webmaster Help explained that you can use a rewrite rule to block people with this toolbar.

Of course, this would block anyone who has the Google Toolbar from getting to your site. Up to you.

Forum discussion at Google Webmaster Help.

Update: I have a new post on how to just block Sidewiki without blocking Google Toolbar users.