Sorry guys, what I was referring to is actually a function of Chrome. I just did a few experiments on different connections. If there is an existing redirection to a dodgy site Google DNS will send you there just like the rest. If the typo is an unrecognised address Chrome will suggest the nearest spelling which is generally what you meant. eg if you type in www.tuxradar.com.au you will get "Did you mean: www.tuxradar.com" and it is nothing to do with the DNS.