This is actually a pretty interesting discussion, 
because of the diversity of strong opinions that 
it produces.

I suspect that, like myself, you're a person of 
some life experience and maturity that you can 
speak from.  Yet, I and you seem to be on 
opposite ends of the spectrum here.

I'd never dream of watermarkimg my cels, or 
taking down a gallery, or password-protecting it, 
because I'd honestly be flattered if someone 
throught enough of my taste and selection in cels 
to want to claim one of mine for their own;  and 
I'd be even more honored if they went to the 
trouble of copying it as a fancel and trying to 
sell it.

But your point of view has a certain compelling 
logic to it as well.  I don't think I would care 
to argue with you about it, because I think that 
it might be a hard argument for me to win....

I wonder whether, at it's root, it has to do with 
how one reacts to total losers.

People who might flatter me by stealing my images 
or making fancels of them are still total 
losers.  But it's fun for me to look down on 
them, and even in their pathetic loser-hood, 
there's an element of flattery there which I find 
affirming.

But that ("that" being my point of view) might 
perhaps be a bit irresponsible, in the sense that 
I am not holding anyone else to any standard of 
behavior;  I'm saying that if someone else's 
behavior in this space amuses me and makes me 
feel flattered, it's OK.

That's because I treat this as a hobby, where I 
do not apply the same standards of behavior to 
other people that I would apply in (for example) 
education or health care.

But maybe you're right.  Perhaps accepting a 
lower standard of behavior from other people in a 
hobby, than I would accept in "real life", is a 
mistake.

Food for my thought.....