What is privacy?
Privacy means you decide who knows what about your body, home, health, messages, money and choices. It keeps you safe, lets you be yourself and protects your dignity.
Many countries protect privacy in their laws, and it is also seen as a human right.
What is public interest?
Public interest is the real benefit or protection for the community, such as safety, health, honest use of public money and fair justice.
Careful: what the public is curious about is not the same as what is in the public interest. Gossip about a famous person may be popular, but it protects or helps nobody.
How to balance them: the three-question test
First weigh: how private is the information, and how large is the public benefit? Then ask three questions:
- Needed? Is there a real, serious public benefit or danger?
- Balanced? Is the benefit at least as heavy as the harm to the person's privacy?
- Least? Are we sharing only what is required, only with the people who need it, only for as long as needed?
If all three answers are yes, sharing can be fair. If one is no, change the plan or keep it private.
Case studies
- Health emergency: telling health workers who met a sick person can stop spread. Share with them only; do not post names online.
- Public officials: how an official spent public money is of public interest. The official's private family life mostly is not.
- School safety cameras: cameras in corridors can protect students, but cameras in toilets are not balanced or least.
- Phone and messages: a court may allow looking at messages of a suspect in a serious crime, with clear limits and permission, not for anyone at any time.
Try it
In the 3D set privacy 5 and public benefit 2. Read the lamps. Raise the public benefit slowly. At which number do the lamps turn green? Tick the box and see what changes.
At home: write three facts about you that you would share with (a) your family, (b) your class, (c) everyone online. Why do the lists differ?
Key formulas and definitions
- Weigh: privacy weight vs public benefit weight
- Test 1: Needed (a real public benefit)
- Test 2: Balanced (benefit โฅ harm to privacy)
- Test 3: Least (share the minimum, with the fewest people)
- Public interest โ public curiosity
Worked examples
1. A newspaper wants to print the name of a patient with a rare disease because readers are curious. Is it in the public interest?
No. It is curiosity, not public good. Sharing the name is not needed and not balanced.
2. During an outbreak, should health workers get the phone numbers of people who met a sick person?
Yes, with limits. It is needed to stop spread, it is balanced, and it is least if only health workers see it and the data is deleted afterwards.
3. A school puts cameras in corridors but not in toilets. Which test explains the toilets decision?
Balanced and least. Toilets involve very high privacy and the safety gain does not justify it.
4. A minister spent public money on a holiday and hid it. Should a reporter publish the proof?
Yes. Honest use of public money is a real public interest and is about the official's public role.
5. On the scale privacy = 8 and public benefit = 5. Is the first test or the second test failing?
Balanced fails (5 < 8). The benefit is real but too light compared with the harm. Look for a smaller way to share.
6. How can a case with weight public = 9 and privacy = 8 still be refused?
If the plan shares more than needed (fails Least). Share only the needed part with only the people who need it.
Common mistakes
- Thinking public interest means what the public likes to read.
- Thinking privacy is absolute and can never be limited.
- Thinking a good cause lets us share everything. The test says share the least.
- Forgetting that public figures still have a private life.