The NYPD Was Ticketing Legally Parked Cars; Open Data Put an End to It
Found on Slashdot on Thursday, 12 May 2016

Data analyst Ben Wellington claims that that the NYPD has been systematically ticketing legally parked cars for years. Doing so, he says, helps NYPD collect millions of dollars every year.
"Mr. Wellington's analysis identified errors the department made in issuing parking summonses. It appears to be a misunderstanding by officers on patrol of a recent, abstruse change in the parking rules. We appreciate Mr. Wellington bringing this anomaly to our attention. The department's internal analysis found that patrol officers who are unfamiliar with the change have observed vehicles parked in front of pedestrian ramps and issued a summons in error."
What a convenient misunderstanding.