content: For all that it is touted, DuckDuckGo has some questionable things itself.  Unfortunately I don't recall precisely what it is off-hand (though the CEO was apparently involved in some reselling of personal information at one point), but I wouldn't consider it to be a one-stop-shop for ensuring Internet freedom by any means, including defense of privacy.  It might be resistant to Google's censorship, but AFAIK some of its data comes from Google, so that part's probably tainted from the source, at least.