After you have wrote your description switch to html mode, paste the following at the end off all the html code that is already written. It will disable the right click and stops most people.
<SCRIPT language=JavaScript>
var message = "This Listing is Copyright Protected";
function rtclickcheck(keyp){ if (navigator.appName == "Netscape" && keyp.which == 3){ alert(message); return false; }
if (navigator.appVersion.indexOf("MSIE") != -1 && event.button == 2) { alert(message); return false; } }
document.onmousedown = rtclickcheck;
</SCRIPT>