I personally don't appreciate people swiping 
scans of my cels..  First, of course, I spent a 
good bit of money on the cel. ^_^;;  But mostly, 
it's the same as any other image-stealing.  
People work hard to get the sources for images, 
scan and frequently edit the images..  It's not 
nice to steal.  Of course, if they make a 
screencap of the scene, themselves, more power to 
ém.  The cel itself may be mine, but the scene--
most certainly not.

Slightly different situation that I've actually 
had occur:  A person "borrowed" images of cels 
from sites like Anime Chaos and Noriko's, and 
used them on her site.  I bought those very 
cels.  (I'd assume she took the images well 
before I got the cels, but only saw her site many 
months after I got them.)  She didn't take the 
images I'd scanned, yet I found myself a bit 
annoyed, even so.  In the end, though, I didn't 
say a darned thing.  I *like* the site they're 
on, and while I don't agree with stealing images 
of cels, even ones that haven't been purchased 
yet, I figure it's not a big enough deal to 
bother with.  Anyone have any comments/feelings 
on this type of situation?  What would other 
folks do about something like that?  I've often 
wondered if I'm being too harsh even caring.