Supplying another person's email address to a service, even an ostensibly benign one, without their permission is a breach of confidence. I know someone who goes ballistic when she receives an email "invitation" to share my photos, calendar, etc. from a third-party service. She fears her email address will wind up on spam lists.
For what it's worth, I'm one of those people who go ballistic when people give my email address to a service.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Open Source Applications Foundation "Design" mailing list http://lists.osafoundation.org/mailman/listinfo/design
