[cookiecaper]

Your post is a bit cynical. Most people are good in most interpersonal matters. This doesn't mean that you should take the gamble, however, on something as personal and important as your primary residence. We should recognize that while most people will not trash your home if you let them stay there without any supervision for a whole week, some people will. I don't know the exact proportion, but even if the chance is small, you may want to think carefully about whether you want to take that chance.

It's important to have a belief that most people are not looking to screw up your life specifically. It's also important to not be so naive that you take dangerous gambles, like the ones made in EJ's story. Better safe than sorry.

There's an important equilibrium to be struck here.

[Uchikoma]

In Russian roulette most chambers ARE empty. Most pulls on the trigger will NOT kill you.

I'm sorry, but I can't understand this "most people are good" argument in this context.