Any of the major internet browsers, have a feature for "in private" or a similar name for those that wish to browse websites and to not have those websites show up in their history file, and in theory not to place "cookies" onto your computer, or to utilize cached items. While this is an improvement, in general, to just browsing through the web "willy-nilly", your activities aren't really truly private, since your location, and the websites that you visit, are still tracked by your Internet Service Provider (ISP) to which your home is assigned a specific ISP address, that is specific to the contract that was made between your ISP and yourself, and thereby contains your name, and your address. While it is true that your ISP provider cannot tell to whom is surfing a particular website, because all the occupants of the house will be utilizing the same ISP address, nor that they can they tell whether a visitor is using the web, nor a friend, nor whomever, patterns will be easily determined over a period of time, that will often easily be broken down through sophisticated algorithms so as to determine the most likely demographic makeup of your household.
While there may be some people, perhaps even lots of people, that really don't care whether they are tracked or monitored or not by an outside source, I suspect a significant amount of people may find it truly disturbing that your ISP knows for a certainty the websites that you visit. The information that your ISP has, is something that can easily be put together to put a profile on you or your loved ones, and also can be an integral part of prosecuting you for certain crimes, such as the illegal downloading of copyrighted material and the like. Additionally, cyber-savvy police officers are known for using the internet to track alleged child pornography files to the actual ISP addresses that have downloaded the files, so that using your browser in a private mode, will not save you from being found out. While many Americans will applaud this type of forensic policing, there are absolutely disturbing qualities about how this police work is actually being accomplished, and questions must be asked as to whom does the police compel or advise to work with them, whether legal warrants are provided, whether there is entrapment involved, or whether any files have been misidentified or mislabeled, all of which should worry average Americans.
The fact that your web browsing is not truly private, that it is in fact out of your control, unless you use different programs or workarounds to "mask" your browsing habits, is disturbing, because it is yet another reflection of how "big brother" monitors everything as if the monitor was actually inside of your house, watching you at all times, monitoring you, instructing you, and taking away your basic freedoms of choice, your expectation of privacy, and even your freedom to think outside what may be the given norm of society in general.
While the worldwide web offers us all sorts of things, both good and bad, it should not be in the hands of either private enterprise or big government, to monitor what we do in our own house, under our own power, that is clearly a step too far, and it should not be permitted.