The easiest way to keep the nosy neighbors from viewing your network is to get rid of the wireless router and switch back to an ethernet cord connecting the cable box directly to your computer. Disconnect when not using if you wish. Disable wireless networking on your computer so your computer doesn't accidentally lock into the neighbor's wireless router. Several years ago, I noticed a sheriff's car parked outside, and the officer appeared to be working on his laptop. I was on my way out when I saw this, but I circled the block to make sure I wasn't misinterpreting what I thought was going on. I then called my husband, who was still home, and asked him to disconnect all the computers, including the WiFi router. I then had him look outside again. Sure enough, the sheriff left very soon after the WiFi was disconnected. I had nothing to hide in terms of criminality, but it really shook me up in terms of privacy. I disconnected the WiFi permanently soon thereafter, only reconnecting it again recently, after learning how to encrypt my signal.
My new laptop also has a switch right on the front that allows me to disable wireless connectivity instantly.
