A law enforcement or peace officer drawing a firearm on a person OCing will create opportunity for a lawsuit, doing so is ill advised. Doesn't matter if the person drawing the gun is a police officer or not, the act would be unlawful. If an officer draws on me, they can expect a lawsuit.
Everyone has their opinion, law enforcement is split. Many higher officials in Pittsburgh, while think OC is sort of odd, respect OCing and will not interfere.
So, buddy, you should get your information from more than one source.
Actually, no, they will not do anything about open carrying, many people feel, even non-gun people OCing is better than CCing since you KNOW they have a weapon.