That's a broad field. I might not even know if some data collected about me leads to a higher price when looking for a product or a flight on the internet. I don't know what the immigration officer or the police may find on record about me when checking my data. An insurer might have given me a less favorable tariff without my knowledge based on some data about my driving experience, my hobbies or my health data. And so on. It is not that you know every time you're screwed that you were screwed ... and even less the reason for this.
On the other hand, somebody collecting data about you always results in an uncertainty: The data is potentially stored indefinitely and you don't know where the data might end and who will use it (potentially for his benefit or against my interests) at any point in the future. There are examples of data collection even with a good intent that ended catastrophic. Currently some Turkish citizens and even academics and journalists fear that they might be arrested just for communicating with the "wrong" people in the past.
At least, you have always to assume that collecting of data, monitoring, thighter security and reduced privacy are never only "for good", especially not for the individuals, but more in the interest of government, corporations, political parties and so on. And you never can go back and demand that your data is deleted: The biggest problem is that you don't even know who stores what about you. Combine that with all the data that is collected about you every day: where is your phone located, whom do you call, mail, chat with, what internet pages are you visiting, what apps are you using and where, which photos are you sharing and where and when we're they made, what products are you looking for, which shops are you visiting, which terms are you googling, what are you posting to HN .... lots of reasons to freak out if all this data points fall in the wrong hands.
Google for something and Google will optimize future results to your known interests. That leads to a filter bubble showing you more and more customized search results. Are you hurt by this? Not knowingly, but perhaps you miss something important. Do most people know about this? Most likely not, so the collection of data leads to a skewed world view.
On the other hand, somebody collecting data about you always results in an uncertainty: The data is potentially stored indefinitely and you don't know where the data might end and who will use it (potentially for his benefit or against my interests) at any point in the future. There are examples of data collection even with a good intent that ended catastrophic. Currently some Turkish citizens and even academics and journalists fear that they might be arrested just for communicating with the "wrong" people in the past.
At least, you have always to assume that collecting of data, monitoring, thighter security and reduced privacy are never only "for good", especially not for the individuals, but more in the interest of government, corporations, political parties and so on. And you never can go back and demand that your data is deleted: The biggest problem is that you don't even know who stores what about you. Combine that with all the data that is collected about you every day: where is your phone located, whom do you call, mail, chat with, what internet pages are you visiting, what apps are you using and where, which photos are you sharing and where and when we're they made, what products are you looking for, which shops are you visiting, which terms are you googling, what are you posting to HN .... lots of reasons to freak out if all this data points fall in the wrong hands.