Now, see, my one problem with utilitarianism is a situation that happened a couple years ago (I might be jacking this from some text book...nobody tell on me). A women was mugged or something, and went to the police station to report it. The cop that took her case made her strip and took a bunch of photos which he later passed around the precinct. Utilitarians would be okay with this, because the happiness caused far outweighs the unhappiness it caused the young women. But it's still wrong.
Here you do bring up a valid concern, but I would hope I could dispell such fears. The Original Utilitarianism proably would not have thought this would have even occured. It was the last thing on the mind of people trying to come up with something that could reform society. THere are some sadistic people who would try to cause misery to others only to benefit themselves. At first glance, it would seem like such a practice as above would be justified under Utility, but I disagree on several points.
Modern Utilitarianism is not the same as Classical Utilitarianism. Classical Utilitarianism focused only on pure happiness, and all happiness was equal. Modern Utilitarianism is largely preference Utilitarianism, and although it has the same general goal to "Do the Greatest Good for the Greatest Number" the means and considerations have changed.
1. It deals with maximizing the preferences of Persons, but also minimizing suffering. In essense, it is compatible with Human Rights.
2. Under Modern Utilitarianism, Person's have moral value, and this moral value is attached to rights, which ought to be respected. This is why, in my arguments, I don't dismiss rights as earlier utilitarians. you are a Person, and modern Utilitarianism respects the wishes and desires of persons. That's the heart of Preference Utilitarianism. As a person you have access to human rights, and even under a utilitarian construct, rights are important, because they are universally useful in society. A society with rights-constructs is better and more happy, overall, than a society without them, therefore, it is useful to keep this tradition in place unless there is some powerful, extrinsic reason to violate a right. By forcing the woman to strip and then taking pictures of her, they are, by getting happy, doing so by objectively violating your rights unnecessarily. They aren't minimizing suffering or saving lives by doing it. Modern Utilitarianism respects the human rights of moral persons in its quest to maximize happiness and minimize suffering. As a rationally atuonomous person, you ought not be exploited against you will merely for the temporary, subjective gain of sadists,
3. Sadism and the Objective vs Subjective. Modern Utilitarianism also looks into the calculous further than other, older varieties. I also take into consideration whether happiness gained is malicious, sadistic, and whether or not there are objective benefits/damages. Most modern Utilitarian calculuses have a clause which discourages malicious or sadistic pleasures, especially if doing so would violate the rights of those with moral personhood. When looking at a calculation, you want to look and see whether the happiness gained is gained at the objective expense of another "person." Happiness is subjective. It is valuable, but not at the expense of the Objecive. Objective gains/damages always outweigh the purely subjective.
For example, Five of my buddies might get really happy if we strap a dog to a chair and torture it mentally, but the objective pain/suffering and damage done to the dog would outweigh the high we might experience, because the damage done is objective, while the happiness gained is not only malicious, but temporary and subjecive. I don't factor in malicious acts into a legitimate calculous, becaus malicious happiness is not good happiness. It serves no greater social purpouse. It never objectively helps society. The dog will most likely be emotional scarred or traumatized. The mental damage and or physical damage done to the woman exploited would not be far removed from that of the dog, except that the woman's suffering capacity is far greater, since she is a "person." I don't think the suffering and human rights violations would be outweighed by the temporary, sadistic pleasure gained by the cops. No quanity of pure happiness (subjective), can be validated via the objective mental, phsyical anguish and pain of another sapient being. It's malcious, unncessary, and totally against the point of spreading happiness--to make a better world.
4. If we look at it from a rule-perspective, what the cops did was wrong, overall, regardless of their temporary subjective gain because of the objective damage it does/can easily do to society. Allowing people in high positions or people in authority to exploit those they are ment to serve and protect is not something I would consider wise or utilitarian. The police are ment to help, and if you were to allow police to freely exploit, punish, injure, or violate a citizen, then you are setting an extremely dangerous precedent. Society would not be very good if the police were allowed to morally do the above. No one would want to live in such a place, so the issue has effects beyond the indivdiual act itself. For example, no one would want to live in a society in which doctors randomly took people from the waiting room, killed them, and then harvested their organs to give to people. Even though they're doing good, they are violating the autonomy and rights of morally important Persons, and at the same time, they are establishing a socially dangerous precedent.
Modern Utilitarianism, is, in a nutshell, the desire to maximize the preferences of all relevant individuals while respecting their moral personhood and trying to minimize suffering. Maximize preferences/Minimize Suffering.