I\'ve a list of empty divs and dynamically inserting a background image – so at first, their background-image: url(); property is completely empty. With some event, it\'s ba
I think @Paolo's answer is correct in general, but some bots might look for any kind of image resource referenced in the page - it's not unthinkable, and certainly not unethical.
If you want to make sure no search engine indexes the images, you can set up your robots.txt file to block them.
If you want to make sure bots do index them, you could for example set up a page containing tags with all the images, and put an innocuous link to that page onto your front page.