You better not ever sing a song to yourself you heard on the radio without the authors permission so as to not violate anyone's rights...
![Roll Eyes](https://bitcointalk.org/Smileys/default/rolleyes.gif)
How about you just use one of those and if they try to force you not to, you stop?
After printing 10k pieces there won't be a way to stop, and I'm responsible for it.
In worst case I'll use some CC form wiki or paint sth. myself.
But I would prefer to use one of those nice and clean pics above.