Pictures on the web, much like grown children, live better lives away from home. As a bonus, they don’t eat all your food and use your hot water. And if they get sick, they won’t infect everyone else. But most importantly when you decide to move house, move to a different country, or if you get foreclosed on, your house burns down or when you pass away, they continue their existence and continue interacting with others.
Pictures on the web should be autonomous units that can act and be acted on in their own right independently of what you do.
Though this sounds scary it is a good principle upon which to base your publishing of images on the web.