ALTHOUGH I RARELY respond to invitations to join widget-based communities that revolve around objects instead of people, I started an account on Shelfari because it relates to a social networking experiment and then violated a second operating principle by failing to scroll down on an "invite friends" screen before hitting the "send" button. It turns out that the Shelfari invitation system is spring-loaded to automatically send invitations to people located in your address book if you permit Shelfari to access your Yahoo!, MSN, or Google Mail accounts. So you might guess what happened next. Shelfari started sending invitations to many people who are stored inside of my Yahoo! address book. These are legacy addresses, some gathered from the early 90s. One hour after I pressed the button, Shelfari invited two dead people, one prisoner (he should probably read books but his warden is reading his mail), the CNN news desk, four European editors--and potentially a boatload of others who I hope I never meet. Their names are in my address book since my Yahoo! account is an amalgamation of a filofax, ACT! database, Notes record set, Exchange mail records, as well as contact data shoveled into Yahoo from a minimum of 20 different phones I have used, owned, borrowed or tested. I would never send a bulk mail from my Yahoo! account. I would have never had a bulk mail sent under my signature so this embarrassment means I have loads of work ahead as I may have to go around and apologise to hundreds of people. I hope that is not the case.