American Law.

Disclaimer: I actually have not read any law books ever, and all of what I'm writing here is based on hearsay, and no one should trust this as a reliable reference. Because, you know, it's America, and someone might sue me for incorrect legal council.

So this is my general impression of American law:

• Common sense is not expected from Americans. ("Putting this plastic bag on your head may cause death", "Warning: coffee is hot", "Do not leave the driver's seat whilst driving").

• If someone hurts themselves in your house, you have to pay for their medical bills.

• If you own some beautiful forest, or a piece of pretty but rocky shoreline, or even a simple greenhouse, it's an attractive threat. So when a drunk person climbs on your property and hurts themselves, they will sue you and win. To get around this, you can make your property much prettier by posting "do not enter" every hundred meters and you'll be covered!

• Instead of law expecting you to help someone in need (e.g. car crash), the law might cover you against the other person suing you for damages that you caused whilst helping.

So interestingly, you can and will be liable for things that someone else's stupidity caused to themselves... but don't worry! You can still legally shoot people (in self-defense, in some states).