1) it in no way shape or form is going 
to 'protect' an image from being stolen.  trust 
me -- i've yet to see one such safeguard i 
couldn't circumvent, usually by simply disabling 
javascript.  

2) any behavior of a web page which *takes away* 
user control i loathe simply on principle.  pop-
ups fall into this category, as do automatic URL 
forwards and other such idiotic 
javascript/history tricks.  

3) the more annoying i find a page, the less 
likely i am to ever return to it.  

so, yeah the no-right-click thing does put-off 
the casual image borrower, but it's far from 
ironclad, and implementing it means that you'll 
be annoying a good number of your visitors, if 
the response to this poll is any indication.