Personal Privacy

Most of us perhaps have once come across a person in the street, who walk towards you directly with piles of questionnaires in hand. Wearing a sweet smile, she would show you a questionnaire and asked whether you have the time to answer the questions politely. At the same time, she may say:" Just a few simple questions and it will only take you a few minutes. Once you finish it, you can get a mysterious gift."
Generally, the questionnaires involve some simple aspects like your name, age and gender. However, some questionnaires may have some sensitive questions, such as your salary, occupation and telephone number. Perhaps some people think these information are not very important because others can do nothing bad to them, or the mysterious gifts are too attractive, so they accept it without hesitation. But have they ever thought that these are their personal information and something you should keep to yourself? It should not be told to strangers easily in case that something unexpected happens.
Also I think that privacy not only exists between you and strangers, but also exists between you and acquaintance, even our parents. Once one of my friends complained to me that her mother always check her backpack without her permission. She was very upset and felt that her mother did not believe her. She was confused whether her privacy was violated or not. Parents always want to try their best to educate their children in order to let them become excellent persons. But from my perspective, parents should give their children some space to grow up by themselves and children have their own right to protect their privacy.
In summary, I think we should consider in other people's positions carefully before we do something involving others' rights. Privacy is a sensitive issue, we may offend it incautiously and cause a big trouble.