even if you disable right click a determined person will get round it - apparently its not hard. best thing to do is to ensure your images aren't hi res- about 72 dpi(i think i have the right term...) is best.
you have to learn to be philisophical about it - if they want to copy tyour work they will...

its that or drive yourself into the grave getting stressed about it. So long as you use low res any prints they make can only be poor quality
if you find them selling on ebay - or being used on a website you can drop them an email reminding them of copyright leg - some people genuinely seem to believe if its on the web its for anyone to use!! and some know better but ignore it
