If you are wearing a copybotted skin, can people tell?
Or people would never know unless they report you?

I have taken skins into the Open Sim world and I get some questions as he skins here are mush superior to what you can get there. I'm not sure if they could tell here or not?

I imagine if anyone can see your 3 textures that make up your skin, they can't really tell where those came from, - or if you bought them or not. Before the time of baked textures in the cache, I would nab skins that way, or even take a demo and edit them in photoshop and import them back in world. Rule of thumb on that was just never sell them. (shrugs)

Yes I would think selling them would be an issue. Otherwise I would think it would be hard to tell if you bought them or not