Brass tacks? Okay, in good spirit, I hope. I never meant, or accidentally, implied that wincusto is like Kazzaa. I'm simply saying that while some people's icons are sacrosanct on Wincusto, some aren't.
Yes, if you want my opinion, using the superman trademark and pirating a CD are relative degrees of the same sin. In both, the owner of the IP has been denied the right to say when, where, and how his IP will be used. Your Paul Boyer example is a good one. Not only does wincusto do that for Paul Boyer, but I know, beyond a shadow of a doubt, that if one of my works was "borrowed" without permission, you'd take it down in a heartbeat.
My quandry has always been, why doesn't EVERYONE, including commercial interests, get that same consideration.
Look at the excuse most people use for distributing mp3s. "It's good advertising for the artist, and I probably wouldn't buy it anyway... and it's not like I am selling it." They are just fans out spreading the messgage. You know that is bunk as well as I do. Yet, when we apply that to Adobe icons, or the wallpaper you mention, There's a difference? Nope. We are just providing IP that doesn't belong to us because people can't get it any other way.
If I made a Superman wallpaper where Superman was a gay, axe-wielding pedophile, the trademark owners would be unenthused to say the least. That's an easy call, but who is to say what they might deem damaging to their trademark? It's for them to say what is flattering, or beneficial, or "fan art", not us. That's why we get permission.
I'm NOT attacking wincusto, and I'm NOT differing with your take on Kazaa and such. My problem is while we are shuffling over to the corporate camp to champion their rights, they are trying to tie down the loose ends of the Internet so that they will remain the eternal middlemen between artists and the public. God forbid the Internet get perverted into a medium where an artist wouldn't NEED a publisher, an agent, a PR guy, and every other leach that has a square inch to latch on. That's a point for a blog of my own, I guess.
The icon thing is a jab, I admit that, because I, subjectively, see a double standard. Otherwise I meant no attack, since I am about as big a Brad Wardell fan as a healthy heterosexual guy can be. (i.e. I'd talk you up to strangers but I wouldn't hang an open-shirt poster of you on my wall.) We're at odds about this, no surprise after 6 years and arguments on skinz.org, wincusto, and finally here. You see fan art as a good thing, I see it as a double standard. It's no biggy to me.