Setting up your wireless router to keep the neighbors out.

[RC]

2. While I agree with your last paragraph, if someone uses your connection to do something bad or

illegal, you can be held just as responsible as the bad guys doing it.
All it takes is to leave your WiFi wide open.

But some people have problems with the neighbors hitching an unwanted free ride on their WiFi, overrunning bandwidth caps, slowing down the feed, etc. And then there is the contract with the Internet provider, which usually has a clause not allowing sharing with the neighbors.

If you want to share, go for it, but beware of the pitfalls.