Google Autofill Search censored?

Has anyone ever noticed that Google won't autofill "inappropriate" searches? For example, it won't help you type "" into the search box. I suppose I understand why isn't on their list of autofill searches, but I noticed that "Adolf Hitler" isn't either. Is anyone else puzzled by this? I'm not a nazi by any means, but Hitler was a morbidly fascinating being human being who I'm sure is a popular internet search. Any thoughts on why Google has censored it from it's autofill search list? Mistake or intentional?