Someone is linking to images on my server
Blogger is a provider of content creation tools, not a mediator of that content. We allow our users to create blogs, but we don't make any claims about the content of these pages. In cases where a contact email address is listed on the page, we recommend working directly with the author to have this situation remedied.
Additionally, there are measures you can (and should) take to protect your images from being linked to, described in the following articles: