[MattRay0295]

Would I be able to connect to someone else's WiFi and use a program for example Cain and Abel to get their passwords? or is their an easier way or more efficient way?

[xerA→]

Not with cain, but you can try bruteforcing it or sometimes its encrytped in the network. Good luck!

[Kyle1995]

I'm not positive but I'm pretty sure Wireshark would do the trick!