I hate to put it this way but it true anything you upload to the internet becomes at risk, when you upload something you need to consider that you are allowing it out of your control when it leaves your computer, It's sad that people will steal it and sell it, But this is what you need to think about when you upload it, want to know something else? they probably signed up here to get into the gallery. So your thief may be a new member at renderosity. Here is what I think should be done all gallery images should be rigged to alert the staff when a right click occures giving them the name of the member who did it.