Google Porn?

I'm a big fan of Google.com's Google Print project. I've been playing around with it some, and it looks like they've scanned and indexed a bunch of erotic books along with everything else. What's interesting is that unlike Google Images there's no "safesearch" to prevent these books from coming up in a search. Granted, you'd have to be searching for a term that would be found in an erotic book, but I'm surprised Google hasn't put anything into place to prevent people from stumbling across them accidentally. Eventually it won't just be publishers and authors who are complaining about the site, but parents and Christian-right groups as well.