Shade, naturally chances are that neither Fox nor Matt Greoning are going to track your friends down and arrest them. They don't have the time--they have to use
that time to make more sub-par programming
.
But anyway, the fact is that the actual picture itself was drawn by the Simpson team, so it's probably copyrighted.
Whether that means you can use it in your game at
all (freeware or commercial) is still unbeknownst to me. I do know that either copyrighted or trademarked material (one or the other) cannot be used at all, whether commercial or not, so you'd have to check that out first. Of course, the laws of copyright is shady because it are different in different countries (like how in the UK, your work is automatically copyrighted, but in the USA, you need to apply before it is officially recognised).
And above all that, I may be dead wrong
.
Evil has a new name. Demo out now!