There is no way to stop images being taken off the net. Stopping right clicking only slows 'a person' down by about .03 seconds! And watermarks.............another few seconds and they are gone too. When someone buys as image of mine, aside from acquiring it 'legally', they are also receiving an image that is far greater resolution than anything I post online. The best way to look at it I think is that photos online are advertising!!!!!!!!! Thankfully, enlarging software is never going to replicate the original full res photographic image......but artwork etc is another story!