ELI5 explanations for need of data privacy

Question

With the fresh rise of privacy concerns among common folks, lots of people start putting forth "why worry if you have nothing to hide"-esque arguments. I wanted to make a collection of "Explain it like I am 5" explanations and some examples for the need for data privacy for anyone online. My favorite example is about insurance companies reading your data and declining services based on their "analysis" of it. I wanted more such examples. So maybe we could make this thread a repository of explanations and examples we all could use to tell people in a way they'd understand!

ev1 · Accepted Answer

With the use of abusive privacy-violating fingerprinting data collectors (that all share user data across their customers), correctly using your right to chargeback a bad merchant can result in being banned from thousands of businesses.Using "alternative" browsers like Firefox, using uBlock, etc. also will result in being banned from sites and banned from ordering.