Great initiative. copy paste and stolen images MUST be fought in a daily base, but I just hope you can be a bit flexible there on your approach... 
As a photographer, there's probably no one hating stolen content more than I do, but some times I just don't feel like writing at all.
Shooting and editing until you get a ready to post good picture might take days, depending on what you're aiming for with a particular shot.
My point is that it is also wrong to go to someone's post and write what you wrote here: 

https://steemit.com/photography/@roxxane/4zvetr-sea-landscape-black-and-white-photography

I would feel very disrespected if that was my post. 
That photo is original, not stolen and posted on the right "photography" category/tag.

Photography is a form or artistic expression as any other, and for sure doesn't need any writing on it. On the contrair, if you write too much you are killing the possible interpretation from who ever looks at it for the first time. 

Please don't get me wrong here, I think that what you're doing is very positive, just don't turn this into a witch hunt.
Cheers!