I’m not sure what type of Router you have, but if I am correct, for anyone to use wifi through your router, they have to “connect” to it. Since I my kids friends connect to my wifi when they come over, I chose the feature to only allow a person to connect if their MAC ADDRESS was listed. So even if they knew the password, if their MAC ADDRESS wasn’t listed in the ALLOWED list, they could not connect. For all of the devices that were ALLOWED to connect, I had to manually type in their MAC ADDRESSES. When I installed Koalasafe, the only wifi they could connect to was the koalasafe wifi, however, I had to go on koalasafe and validate their device before they could actually “use” the wifi. So my wifi router was locked down to MAC ADDRESS only, and the koalasafe wifi had its own feature to prevent anyone else from using it without authorization. Not sure if this is going to help you, but I thought I’d post it anyway. Take care.