I run an online portfolio service FolioHD (http://foliohd.com) and we get that question a lot: "Can people steal my pictures?" We've gone the extra mile to make sure saving pictures is a lot harder than a right-click and Save As, but it seems like lot of people don't even bother trying that first before asking. All the while, a simple screen capture of whatever you're looking at is just as easy, yet no one seems to know about that trick. The assumption is that Flash is safe, but not even Flash can protect against a simple screen capture.