I think all of us have encountered examples like this. I consider myself a fairly savvy user, but a few years ago, I was caught by geni.com's invite policy (it

I think all of us have encountered examples like this. I consider myself a fairly savvy user, but a few years ago, I was caught by geni.com's invite policy (it was endorsed by Time Magazine, so I trusted it more than I should have). I entered the email addresses of a few family members, expecting them to be invited to join the family tree. Instead they were automatically opted in to a deluge of daily email updates about family activities/events. It made me fairly unpopular for a while at family gatherings, especially with older family members, who couldn't find the "unsubscribe" link. I think some of them still have to manually delete messages every day.