Is there a way to revoke access to specific devices that end up connected to your network? I haven't found a way to remove individual devices without having to reset the whole system and rejoining all devices again, so... Every device I don't know I just pause their Internet connections until they come out and let me know who's who. So, other than pausing their Intent access, is there any other restrictions or revoking of rights I can do?
Home WiFi networks use a shared password for authentication. Once a device has that password, it can connect. There's no way to revoke the password for just that device (this is something enterprise WiFi networks can do – each device authenticates with its own credentials and those can be revoked individually). You can pause a device, but that will only block it from opening new connections to the internet. It doesn't stop that device from connecting to WiFi or communicating with other devices on the local network. I would recommend using the Guest WiFi feature to have a separate password you can share more freely with potentially untrusted devices. Then just change that password regularly (weekly, monthly... whatever works for you). That will kick any devices off that are still using the old guest password without impacting any of the devices using the main password.