I actually think it might be technical naivety? Eg families know that you can share videos on YouTube, so they want to share their family videos to other friend

I actually think it might be technical naivety? Eg families know that you can share videos on YouTube, so they want to share their family videos to other friends and family, and don't understand permission settings and other such intricacies. Like most people here likely do, I run tech support for my entire extended family, and a very very common theme is trying to share photos/video with family and friends. Apple locks down iCloud so it's only easy to share with other iDevice users, and YouTube makes it REALLY easy to initially upload a video (drag onto this box, or just share from your phone/tablet video browser) but then doesn't clearly explain the different options in the processing screen, etc etc. They also don't understand the repurcussions. They're not on reddit reading about Elsagate, they're not aware of the deep seedy underbelly of the Interwebs outside of "people buy drugs on the darknet" because they saw it on the 7:30 Report. They think the Internet is Facebook, Google, YouTube, and Amazon. It's extremely easy for technically proficient people to underestimate how complicated and overwhelming these "simple" (for us) tasks can be to non-techies.