What about art fraud? I know how to detect certain forms of art fraud. I have to count on 999 others to make the right decision? Yet it's just a random group and majority wouldn't know the first thing about what to look for? So either, by dumb luck, this art fraudster can continue on earning, or not.
Do you downvote people for posting Giphy gifs?
Giphy does not own the copyrights to any of the images it hosts.
“Instagram‘s privacy policy states that “[b]y using our Service you understand and agree that we are providing a platform for you to post content, including photos, comments and other materials (“User Content”), to the Service and to share User Content publicly. This means that other Users may search for, see, USE, or SHARE any of your User Content that you make publicly available through the Service.” (Privacy Policy, Instagram.com, Instagram Help Center (last visited Mar. 5, 2015)) The privacy policy further states, “[a]ny information or content that you voluntarily disclose for posting to the Service, such as User Content, becomes available to the public, as controlled by any applicable privacy settings that you set. . . . Once you have shared User Content or made it public, that User Content may be re-shared by others.” (Id.)” **
By this measure it seems that anyone can repost what they find on instagram without attribution as much as they please.