While I haven't heard anything similiar from Omaha police officers, I do know that open carry in Omaha isn't encouraged. When I first got my Omaha Handgun Identification Card back in the 1990s, I contacted the city attorney's office, who refused to discuss the matter. I called OPD, and was handed off about half a dozen times. Finally I spoke with a Sergeant who told me that open carry was legal, however if someone complained, I would be arrested for disturbing the peace. Other than open carrying when working uniformed security, I have avoided the issue.