> I moved into a new house and did not set up the lawn irrigation system. Despite being disconnected from the cloud service, the system kept running its schedule, when I would have expected it turn off in order to conserve water.

Not running when disconnected is definitely a safe default, but I'm not sure it's automatically desired. If I found out I couldn't use my sprinkler system unless it was connected to the internet, I'd be annoyed at the unnecessary gating of such functionality.