The CC licensing of the images on this site is more than a little suspect. I'd love to know how this user https://thngs.co/users/4 owns the rights to thousands of professional catalog shots spanning the last ~100 or so years.
It's one thing to lift images for use on your site but quite another to release those stolen images under a CC license.
Not really much to share other than you can get you in some legal hot water. Luckily for me it was caught before I got in too much trouble. Now my terms just say something along the lines of "images are property of their owners".
Same could apply to text too. If some user comes and pastes an entire section of a website that's also not good. I haven't run into that yet so I'll have to see how that turns out.
It's one thing to lift images for use on your site but quite another to release those stolen images under a CC license.