Official NYPD security camera notice

This is only sign for a NYPD security camera I have ever seen....wonder what prompted it.

Security cameras abound here, of course.

From the internet:

Some areas seem to be more private than others, but there's no practical way to know for sure. The island is dotted with thousands of security cameras, operated by the police, shops, and office towers. A couple of groups have tried to count those that are visible, and their results suggest somewhat lighter surveillance far uptown, with the exception of Columbia University and parts of 125^th Street. In comparison, Times Square, Greenwich Village, SoHo, and the Financial District are riddled with cameras. (Shutter-shy New Yorkers downtown are best off in the Lower East Side.) But there are hundreds, and perhaps thousands, more cameras concealed behind tinted windows, or tucked inside of lobby smoke detectors, clocks, and sprinklers that are not included in these counts.

In 2005, the New York Civil Liberties Union conducted the most intense camera count (PDF), but focused mainly on Lower Manhattan. The group counted 4,176 cameras below 14^th Street, an area about one-sixth the size of the island. That's up 443 percent from 1998, when the group conducted its first study. Greenwich Village and SoHo offered the least privacy, with a rate of three cameras per acre, or one for every 84 residents.