Legally what is illegal is hotlinking, showing an image in your forum that is hosted in another site.
You ar consuming their bandwidth, and if you have no rights to do it, you are breaking legal rights.
In the case that the owner of the image in Flickr is linking the page in our forum, I don’t see any legal issue.
Users of our forum, accept giving us the right to show their images in it.
Thus we are more confident with images uploaded to our forum.
And linking images has other problems: if they delete or change access rights to that images, or simply delete their Flickr account, they break image visibility in our forum.
@pfaffman I have that option activated, you can see the image is not shown from Flickr, but from our forum after downloading it (see image insertion code between url tags).
May be I have explained it incorrectly, you are right, that parameter is of great help, for us.
The problem is that the system keeps the url surrounding the image, so when you click in it it directs you to Flickr and does not show it in the lightroom.
We want to prevent that, we want the image to be displayed in our forum.
We don’t mind if the user puts a link to the original image in Flickr (the other url tags surrounding the title) but we want the lightbox to work and the image to reside in our site.
In other words, thy system should have converted the bbCode to this (when you activate “download remote images to local”):
[url=https://flic.kr/p/2g9UvZW]Libros con farol...[/url] by
[url=https://www.flickr.com/photos/jcrla/]JAVIER[/url], en Flickr
Not letting you surround the image by …. or show you a link icon next to the image, but not disabled the lightbox when you click on the image.