The other two... not so much. But you know, silence is in these instances an acceptable response to being informed that no, free use of my work isn't actually such a compliment as all that.
So, now I've adjusted my profile information on Flickr to state that my work is available on a pay-for-use basis. Because, you see, since I've sold prints of several of those images to people, it is hardly fair for someone else to get the use of them for free.
Also, my feet are currently being caressed by the gently twitching paws of a dreaming Border Collie.