That is true and I would totally agree that the coins should be sent back to the original owner if he can found and proof he is the owner. Since there are so many informations already in the thread I think to many people could fake that they are the owner already. IF the OP doesn't want to keep the coins there is for example this: https://www.savethechildren.org/us/ways-to-help/ways-to-give/ways-to-help/cryptocurrency-donation