Among the biggest but least discussed expansions of government power under Mr. Bloomberg has been the explosive increase in arrests for displaying or burning marijuana.
[...]Nearly nine out of ten people charged with violating the law are black or Latino, although national surveys have shown that whites are the heaviest users of pot. Mr. Bloomberg himself acknowledged in 2001 that he had used it, and enjoyed it.
On the Upper East Side of Manhattan where the mayor lives, an average of 20 people for every 100,000 residents were arrested on the lowest-level misdemeanor pot charge in 2007, 2008 and 2009.
During those same years, the marijuana arrest rate in Brownsville, Brooklyn, was 3,109 for every 100,000 residents.
That means the chances of getting arrested on pot charges in Brownsville — and nothing else — were 150 times greater than on the Upper East Side of Manhattan.