OK in relation to Skinning.
Where is the line drawn?
Sure there are rules and regulations, some even I was not aware of through ignorance of not knowing "where" the line is drawn.
There are so many schools of thought and philosophy on this, too many to mention, but the point being, that the line is sometimes drawn immovably when it should be flexible and vice-versa sometimes.
So lets be semantic hypothetically:
John Doe creates a skin called "Idiosyncratic innuendos". Joe Blo dowloads it and three weeks later releases a skin called " Natural implications".
It might be a different color, shape and style but there is no doubt the original idea has been copied even though the graphics are different and the title reworded.
Have they copied it? No and Yes. You can go down and drill down further where one school believes if it is not broken do not fix it, but that too has far too many implications that can be stretched beyond reasonable acceptability.
Skinning and copying or skinning and influence or skinning and ripping off. ALL very close. At least I know where the lines are now.
I too did Winamp skins 20 years ago. I think the AKAI one is still out there somewhere? Who knows, I do not use Winamp anymore, VLC is simpler and faster. Yeah I can skin it and have but I use it 'coz it be fast