This is from 10+ years ago, but promos that taunt the other station for their perceived shortcomings, orders from management for field crews to go scorched earth with the competition when out on stories everyone was covering - block other stations from getting interviews that they happened on first (witnesses to car crashes, fires, and crimes and other things where there's really no meaningful reason to sandbag the competition), on one occasion WBBH deceived the widow of a murdered police officer saying they would share an interview they did with every other station but really used it as a heavily-promoted exclusive (to be fair, they did give WINK and FOX4 the video a few days later after it aired and other stations learned of the sketchy tactics they used to get the interview and possibly a chewing out from the police department PIO) And management where I work definitely frowned upon being friendly with people from the other stations socially.
All things that didn't happen in any other market I worked in. Healthy competition? Yes. But respect and understanding the biggest difference we all had with the people working at the other stations was the name of the company on our direct deposit.