While I agree that examples are stupid, I am not so sure about the electrical and plumbing. Connecting things to a public water supply that result in contamination from backflow/​siphoning is very bad. You also dont want to electrocute a power pole worker who thinks power is off, but your house with DYO solar connection suddenly starts exporting power to grid. If I was insurer, I would take a dim view of unregister plumbing or electricial work in your house because of fire and flood risk. Where I live, so long as you are owner of property , you can do electricial that doesnt involve swithboard or cables coming into switchboard from street. Fair compromise? Drainlaying rules are still extremely strict though.
While I agree that examples are stupid, I am not so sure about the electrical and plumbing. Connecting things to a public water supply that result in contamination from backflow/​siphoning is very bad. You also dont want to electrocute a power pole worker who thinks power is off, but your house with DYO solar connection suddenly starts exporting power to grid. If I was insurer, I would take a dim view of unregister plumbing or electricial work in your house because of fire and flood risk. Where I live, so long as you are owner of property , you can do electricial that doesnt involve swithboard or cables coming into switchboard from street. Fair compromise? Drainlaying rules are still extremely strict though.