I agree with @archaeopteryx. But even for people without huge followings on social media, word still spreads. Someone shares your neat photo. Then someone else does. You just never know how far an image can go and it can go quite far. 

Several of us on these forums are also publishing our photos. If you're doing that, then the impact--and therefore the need to be responsible--is all the greater because, by definition, you are putting your images in a places where they will be widely seen.