There are so many stock images, but sometimes I just look and see what is in my image folder. I try not to be "guilty" but I must have had at least a single transgression. I think that technology will fix itself. If I earn Steem for example on an accidental infringement, it should be easy to correct as it is recorded on the blockchain. An artist could hire a bot to find their images and inform the user of the transgression or even sue. I think the tech will work itself out. What say you?