The cameras you're discussing are not very safe for the layman either; you wanna be sure you have a properly-configured perimeter firewall before you use them and that they don't open any ports with UPnP. A cursory glance at shodan will reveal many such cameras that are happily streaming their images out to the open internet.
Upnp in its intial form, getting media devices to talk to each other and exchange data, was fine. But how the heck did it end up being about punching holes in firewalls?!
