Depending on the size of log cabin it could be anyone.
When someone sets up a a Wirelss network, there is an option to use a Wireless Equivalency Privacy (WEP) key. It is bascially a password that anyone who wants to get on the network has to type in to access the network It is used as a security device so not just anyone can get on their network. So to answer your question, you need to ask someone for their network key to log into there wireless network.
Log all activity on the network.
Without network security, anybody could just hack into the network, make adjustments to files, database's etc... Just think about your bank for example. Without network security anybody could just log in and look at your details, transfer money in or out of your account etc...
Event Viewer is used to view log on with a standalone computer or a computer in a workgroup, but Windows firewall is used to view log on in a network.
It means you can not connect to the Minecraft servers, check your network.
So the network can correctly identify you, personalize settings for you, and allow you connection to the network (or internet).
Yes, even most cheap wifi router can log web address visited and more advance setting can even log your keystrokes
If you have a strong password set for your WiFi network and have never shared it with anyone, chances are your neighbors are not connected to your WiFi network. If you have a router installed you can usually log in and see the table of systems connected to the router. You can always change the password for your network and this will disconnect everyone who doesn't have the right password. If you don't need to enter a password to log on to your network, your network is not protected and a password should be set, to do so, find out the manufacturer of the router and model and then search for instructions on how to protect your WiFi connection for your particular router.