This isn't SEO we're discussing, this is simple indexing and spidering.
Another bad metaphor as the internet is a different type of medium and if the librarian didn't scan the internet, nobody would know where anything existed in the first place and it would be quite useless, as useless as a library without a card index.
Besides, arguing the validity of opt-in vs opt-out is silly in this instance as the site wasn't properly secured in any way shape or form. So what if Google stayed out, there are a LOT of other things crawling that don't even identify themselves as bots that would've gotten that information, probably did, and probably still will do so if they didn't fix the site as now it's a worldwide target for hackers with the exposure of taking it public.
Sometimes these people simply don't think and they're teaching our kids.
I weep for the future.
[edited by: incrediBILL at 9:31 pm (utc) on June 26, 2006]