I am not a photographer although out of thousands of snaps that I have taken over the years I have got the odd publishable picture and one or too that could have been used in court as evidence of negligence.
I suppose that any of the photos I display on web sites will only be used to show how not to do it. I do collect astronomical photos for stellarium, Some from IIS but in all cases I have approached the owners for permission and duly acknowledged them.
There are many amateur (professional) photographers charging astronomical prices for wedding photos. They all expect the money before you get to see them.
If you take pictures professionally The only way to avoid problems is to sell them before you publish them. Once they are published they will be fair game to the "bad guys". As Brent found out I expect that many of the spectacular rally shots that are published in magazines are in fact technically copyright infringements using enthusiast's material that is gleaned from many places without acknowledgement.
Barry
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