Absolutely, unequivocally do NOT use Google’s DNS if you value your privacy.
Yes, I’ve been trying to avoid using Google for that reason.
You guys... It is easy to be uncomfortable with things you don't understand, but if you break it down, there is no harm in Google, and if there was, the only thing you could do is unplug your computer. Cars KILL people, about 40,000 people a year, but you don't think twice about driving. Same principle with a network, there are accidents, but the good vastly outweighs the bad.
Now, so you think you can outwit Google? You can, but you should know that ANY server can and does collect data about you so as to make the net faster, safer, and cheaper. From the first server you connect to get on the net, all between that and your desired web page, sometimes as many as 20 or 30 at any one time, all can and do collect data. Not your name, but you location, time, length of time connected, pages viewed... But no personal data. It is all demographic and geographic data that is used any number of ways, all benign to you. And there are so many of you's, like grains of sand at the beach, that you are lost in the vast numbers. If someone does want to view your posting history, and can get a court order to do so, you are toast no matter what you do. So enjoy yourself, just don't think anything you do can insure your privacy if someone has a court order. And what are the chances of that for all us law-abiding FReepers, right!