As well as stealing your pics - surely its not right letting potential buyers "assume" those are the hens they are buying?
Someone on Ebay was selling t shirts showing ponies - mine and someone elses ....using a copywrited photo. E bay were alerted, but the t shirts (mugs, mouse mats and whatever) were still listed, but under a different username. I was furious both that they had used the pic without permission, and also that they had the cheek to relist under a different name!!!