"It is likely many of those sun glare and glare from the flash cases were produced by reflections from plate covers," said the administrator of Placard Corruption, a Twitter handle that regularly posts photos of offenders, including cars parked in front of NYPD stationhouses and by Police Headquarters in lower Manhattan. "Many of them have a mirroring design to reflect light directly back for the purpose of overexposing the photograph. We believe the DOT's estimate significantly underestimates the impact of this fraud."