No they haven't.
Are you at all aware of the current screening process for the NYPD?
You can openly admit to repeated marijuana use in the application and not be DQ’ed, (and strangely enough) it doesn’t even lower the chance of getting hired at this point if you are a blood relative of another NYPD officer.
Granted the total number of applicants to the NYPD has spiked in this recession and the large number of war vets returned to the civilian workforce, making the entire hiring process much more selective in recent years.
I’ve known/know a good number of prior and current NYPD and MTA cops, none of them were saints.