It's been mentioned numerous times. But I cannot stress just how absolutely vital it is that you do something about the images being displayed. You need to address the size/quality and/or put some sort of water-marking on them. Whatever you can come up with that will address the RAMPANT theft that is happening. I don't think you even grasp just how widespread and out of control this problem is.
1. A thief either steals the image(s) and posts them under a different merch account... OR takes them to another site outside of Amazon and sells them there.
2. If the thief sells it here through Amazon - it's bad because it ruins the original creator's income. It can potentially ruin their business if they have any branding attached to it. And, on top of that - it will be a POOR QUALITY product that will cause people to not want to buy from Amazon. It will be pixelated, skewed, etc... You should see some of the uploads these folks are doing. And, it will make the REAL artists leave.
3. If the thief is selling through an outside site, they almost always put up ads and those ads drive the business to their site instead of Amazon. This is a lose-lose for the artists and Amazon. Again, it's a poor quality product that will be associated with our own branding which means that not only do we lose out on that sale (both the artist and Amazon), but when they later see the same stuff here on Amazon, they won't buy it thinking it's the SAME GARBAGE they got scammed into purchasing. This sort of thing has LASTING effects.
4. Once the thief has the image it's game over. Good luck chasing them around the internet - though many of us will continue to do it until we are dead and buried. They will continue to upload it over and over and over and over and over again. Again, this is ridiculously exhausting - absolutely frustrating - incredibly time consuming - and is RUINING people's businesses.
If you don't step in and find some sort of solution - I'm not looking for you to end theft altogether - it'll never happen - but take some measures that will help reduce the problem and bring it back down to a manageable level - you will lose people. Either because they realize it's not worth their time once the thieves steal all the sales away from them or because they LITERALLY are put out of business.
I appreciate your reading this far if you have gotten to this point. I'm begging you, step up to the plate and protect us AND YOUR OWN BUSINESS.