每一个数据工程师和产品经理都应该把最后一节，Doing the right thing，读十遍。
automated systems can systematically and arbitrarily exclude a person from participating in society without any proof of guilt, and with little chance of appeal
machine learning is like money laundering for bias
when services become good at predicting what content users want to see, they may end up showing people only opinions they already agree with, leading to echo chambers in which stereotypes, misinformation, and polarization can breed
Data is the pollution problem (as in Industrial Revolution) of the information age
we should stop regarding users as metrics to be optimized, and remember that they are humans who deserve respect, dignity and agency.