Make expectations clear and start issuing consequences for not following them. Sounds much easier than it is... The key is to turn that feedback cycle to your

Make expectations clear and start issuing consequences for not following them. Sounds much easier than it is... The key is to turn that feedback cycle to your purpose. Once consequences start flowing, word will start to get out that "this one has teeth". You want people to get dirty looks and comments about bad behaviour. That negative response will then feed forward into future decisions.