New BB Code Needed

Currently we hide links in [ code ] BB tags, however it doesn't hide anything and the content of code tags gets indexed in search engines. For instance the other day a member here posted a URL to one of my sites, and 20 minutes later i knew about it due to Google Alerts picking up my domain posted in the code tag.

It would be great to add a new BB Code, for example [ hide ] and make this content viewable to members only. This way if there's anything we don't want indexed such as a link, we can use this tag without alerting the site owner.

Thanks.