I think this is true for emails but not true for web publishing. Oh, wait a minute; you didn't realize you were publishing? Well, you are. As we speak, several websites are sucking in the LAVA RSS feed and displaying the posts on there front page. Your message is crawled by Google and Yahoo on a weekly basis and added to the archive of information which will be scanned by future researchers looking for help on LabVIEW programming or other strange keywords. Once it's out there baby, it's permanent. For the world to see.