Well, they could drugtest your wastewater [0] and measure your water consumption with one of these "smart" meters at small intervals. It's not at the scale of d

Well, they could drugtest your wastewater [0] and measure your water consumption with one of these "smart" meters at small intervals. It's not at the scale of data that an ISP could sift through, but with a little imagination, water can be a source of metadata... [0] http://www.dw.com/en/experts-on-drug-wastewater-analysis-say-its-time-for-policymakers-to-get-onboard/a-16798866 http://www.dw.com/en/experts-on-drug-wastewater-analysis-say...