I agree Edward & Rod, all my images are low-res as they upload so much quicker.
Rod I expect you have been offered a fee or credit my responsible people, I have been finding my photos on peoples blogs, which get copied onto other blogs and so on and so forth.
The original usually links back to me but then you loose track of where they have gone.
I really don't mind that so much - but I do object to them being used by a commercial concern to advertise their wares!!
It looks as though once you have put them on the internet they really become public property