It is wise to get a couple of things clear here. It is nigh impossible for accreditation to made on every photograph that appears on PPRuNe and for that reason the hundreds x ? that have and do appear on these pages over the last 16/17 years cannot, except for the odd few, be properly identified so we mods/PPRuNe take the view that it is a normal function of the site to publish what is put here. Judgement is then made on each case.
However, it is a particular trait of Coff to credit the pics when it is possible. He always does that. And good for him. But if he has a picture to show is he expected to go hither and thither trying to find out who took the picture? Of course not.
If Ray Deacon took that picture of the Gnat, which I have seen before - in other mags and aviation sites. To berate someone for it is hardly fair. What he should have done was to make the photo copyright by showing it on the picture. Only then can anyone know it is copyright. Countless magazines and other aviation sources publish pictures they cannot identify.
While everyone knows their place in the scheme of things on PPRuNe it is workable. As always if someone can claim a picture is copyright they would have to prove it. PPRuNe takes the stance on copyright that it should not be infringed if an image is copyright identified. In other words there is no way that a picture will be prevented from being shown if it is simply not known who it belongs to. There are millions of pictures all over the world that are copyright and millions that are not but if the copyright owner does not protect his 'work' or snaps then he has only himself to blame.
And we should not forget that there are many who 'use' the pages of this site to display or try to sell their wares in one form or another. In that regard we try to take a personal view on what is acceptable and what isn't.