I do not see what is wrong about this part (other than the illegal(?) nexus with lawyers). CC licences still have to be complied with (or the user can contact the copyright holder for an alternative licence).
GPL infringers have been taken to court as well, and a legal, for-profit litigation initiative might be a good incentive that encourages compliance: https://en.wikipedia.org/wiki/Open_source_license_litigation
There are individuals in Germany (two photographers IIRC) who upload photos to the Wikipedia. The licence is always CC with attribution, but that part is badly presented on Wiki (or was). Next thing, they wait for people to use their images and go around to sue everyone who doesn't display the attribution string alongside the image. It is just predatory behavior. They guy sent me an E-Mail with an pay early option. Their claims are also this weak, that the guy trying to pull this off with me was instantly silenced after our lawyer sent him a single letter.
If this is a problem that you have knowledge about, have you ever considered contacting Creative Commons about this? They could perhaps provide legal guidance or even modify the next version of the license (if there is a next version).
Maybe don't pull images from Wikipedia for exactly this reason?
Another detail of that scheme: Wikipedia actually does not do (correct) attribution on their site (no attribution next to the images. So if you mirror/copy Wikipedia content, in germany you will be sued by "photographers" who won't enforce their attribution on wikipedia but will on your site (to make a profit, see above).
More recent versions like CC-BY-SA 4.0[1] explicitly say that it may be reasonable to attribute via a hyperlink.
Older licence versions do not have this line, but even then, it could be argued that Wikipedia itself is not infringing because attribution is still provided as part of the same work (considering the whole of the German Wikipedia as the work), rather than on an external site.
Unless German courts have already ruled that attribution has to be next to the image?
1. https://creativecommons.org/licenses/by-sa/4.0/legalcode#s3a...
"Order of Parental Glory" [1] is one of the examples. Strangely enough, many of the examples of inline attribution is for images from kremlin.ru, meaning there's probably some kind of agreement that mandates inline credits back in the days, but no longer anymore.
If you don't have JavaScript enabled, it's still displayed when you view the full-size image, but it loads a different page to do so.
But yes, of course, if you use pictures under a CC-BY-* license, then you must comply with the terms (including attribution).
A (somewhat dated) example at [1] (german).
[1] https://www.lawblog.de/archives/2009/11/17/abmahnanwalte-ver...
Edit: When they send in that notice (die Abmahnung) they will ask for money for incurred costs. Since they did not pay anything in advance - the lawyer worked for free - there were no costs. That's not legal here.
What exactly was going on? Have they published images in misleading way?
Or is it case of going after people who published images with "source: Internet"? Or case of attacking people who made honest effort to attribute author?
Because I am familiar with big corporations using freely licensed work and ignoring attribution requirements. For example Facebook is displaying map using OpenStreetMap data. OpenStreetMap license requires a clear attribution, visible to all users ( https://www.openstreetmap.org/copyright ).
Facebook is ignoring that, Facebook employees claimed to be working on improvements, nothing was improved - attribution is still cleverly hidden.
The same with for example Snapchat.
But for all what I know they could be targeting marketing departments using stolen photos in ads.
As far as I understand, they don’t get that much more damages from larger cases, so they target masses of small fish instead. Individual ebay sellers, small private clubs (which are ingrained in the German culture) and the like.
But large business/enterprise screws up with image licensing too, and ends up just paying as well.