Well I mean the whole story is that google's own evidence was that the experiment didn't bear any fruit. The web is made of URLs and hiding them would be like

Well I mean the whole story is that google's own evidence was that the experiment didn't bear any fruit. The web is made of URLs and hiding them would be like taking the express train back to the AOL days. This "feature" would have brought negligible (if any) security, but would have made the web many times more difficult to use for both inexperienced and power users alike.