I don't know what you mean by "in different cases", but really? You think that actually happens - you turn up at a fairly major tech journalism website's office with a plastic dummy, and they run a story with their watermarks on the pictures and the URL "[your]-phone-hands-on-preview"?

There's being cautious, which is good, but there's also slipping beyond that into outright paranoia...

p.s. You can fake video too you know

p.p.s. https://xkcd.com/331/