who consented to the conditions of your house when entering. If he is not sure he ought to hire a civil engineer to inspect and verify the safety status of the house or ask the host to do it.
>your children,
who is your ward and is subjected to the decisions of its parent with regards to all of life choices
>the person that buys your house next,
ditto the guest situation except for buying
>the person that lives next door
this is the only legitimate case for regulation, to protect the public and/or third party.
>so they threw their (still very hot) excess soup from their pot out the window and it got all over me.
This is not a problem of housing but of manners. You can get rid of hot soup without infringing of other people's ability to walk around the public area and not be wet.
I think the solution is to move away from cities. I'm planning to do so. I'm just going to be sad if it means leaving my country because you don't want me anywhere near you, even if it means I'm on the horizon from your window.