Answer:
It mostly depends (IF YOU ARE COPY-PASTING GO TO EXPLANATION)
Explanation:
It mostly depends, are any of your passwords alike? If so, that can be dangerous, even if you "trust" your neighbor. Your computer could also be infected with malware. The neighbor could make security mistakes, etc. Really think about how much you can trust them.
It can be hard to give them updates on new security such as new passwords. Also, not everyone is completely aware of why you would put the amount of security you do, (more or less than they think should be there) and you could get complaints from them on YOUR security.
It would be best to just politely decline, or get a guest network. Guest networks are safer, but some complications are still there, such as the ones in my second paragraph. So, safest and best option for both parties would be to decline.
