I can actually add to that.  When doing the 
watermark, put it on a super detailed area--it 
doesn't have to be an important area, but a 
section with a bunch of lines and/or different 
colors is better.  Drac's site is a good example 
of that, because hers is the only image from the 
scavenger hunt I wasn't able to *EASILY* remove 
the watermark from in MSpaint (yes, in that basic 
a program)

As for image protecting, right click disabling is 
easy to get around...well, for me it is.  I'm not 
going to say how, but two good sites with 
protection are Xelloss' site, because she 
passwords access to her full-scans, and Kitt's 
site, because her full scans pop up in individual 
windows with the right click disabled, which 
disables one of the 'easy to get around' 
methods...

Oh, and if you have the option of password 
protecting directories, that's a good thing too.  
If you can password protect your image 
directories, you should still be able to access 
the images on non-passworded pages (with rt click 
or some other kind of protection) but going 
directly to the sources (once again, not going to 
explain how) would be impossible.

^_^ Hope I wasn't too vague with the 'not going 
to explain how' but I really don't want to give a 
tutorial about getting around different forms of 
website encryption.  

(and NO, I learned this stuff years before I even 
knew what a cel was, so don't start getting 
paranoid)