It's only a valid issue if Amiga.org has specific permission to use the logos in the first place. I'm not saying they do or don't but that's the first point that comes to mind. If AO doesn't have any specific permission then they have no rights of any type regarding ownership and are as much at fault as the eBay "pirates".
I'm probably alone in this, and that's fine, but I always laugh a little when someone makes their work readily available in a public place and then jumps up and down screaming bloody murder when it's copied. I've had several works of my own used by others, and in one specific case, by a competitor in direct competition with my own services. What can I do? Cry? Yell? Curse almighty God in heaven? I could, but that's about all the vindication I could scrape off. Otherwise, it's best just to accept it and move along. If you don't want your stuff copied, don't use a medium that you know full well is designed in part for that very purpose.
Get my drift, Spiff :-)?