I have a background in both embedded systems engineering and pentesting. I definitely know about the weak security (or complete lack thereof) of those devices. But it's hard for non-technical people to believe that, especially if the salesman told them this camera was the 'best of the best'.

So, of course I helped them to setup the IP camera in such way that they could use it securely. (VPN, strong encryption on their WiFi, etc)

And of course I also explained them that they should be careful with whom they share the photos.