You're absolutely right. I just knew some people would respond by saying we shouldn't blame the tools, and in a narrow sense they're right. However, that doesn't detract from the point that some of these shiny new toys are pretty darn dangerous. We have a responsibility to understand and mitigate those dangers, not merely deploy tools that we barely understand with consequences we understand even less. Training, safeguards, and oversight are necessary. Failing to check the results from the latest bit of Hadoopery is the data equivalent of leaving sharp power tools on a children's playground. "It's not the tools' fault" is incomplete and misleading.