When we were shopping for a baby cam to keep an eye on the baby, I opted to get a simple RF cam [1] instead of the more popular IP cameras that allow you to use your smartphone and monitor from anywhere.
The lower tech approach means you can park a van in my driveway and probably pick up the signal but that's a lot harder (and more obvious) than scanning an IP range from anywhere in world and finding vulnerable devices.
I got a Wansview camera and assigned it a static IP and just don't allow any traffic not originating from the chromecasts or tablet -- it's nice because all the TVs do picture in picture with the baby camera.
Still pretty weird seeing the constant log entries trying to reach a couple servers - I've been doing traffic capture since I'd like to see what it's trying to do. One is obviously the plug-n-play stuff, but it's crazy that those packets apparently get broadcast outside the network (? - I haven't really looked into how that PnP IP/port is handled but it's getting caught at my firewall).
The lower tech approach means you can park a van in my driveway and probably pick up the signal but that's a lot harder (and more obvious) than scanning an IP range from anywhere in world and finding vulnerable devices.
[1] https://www.amazon.com/Foscam-FBM3501-Wireless-Digital-Monit...