I confess I'm not really a member of the GraphicDesign.SE community, I just read your top questions newsletter. But I've noticed several times you have what are really legal questions, and am curious if you consider them on-topic. I've seen Are licensing questions wanted? which seems to general "idea" legal questions are allowed, but what about:
That's a question about a particular use of specific potential intellectual property. That's not a general "idea" question; its fairly specific. And it seems that the answers here don't really reflect that—e.g., there has been litigation on copying user interface elements (another famous one even involves Apple), but the answer seems completely unaware of that. Of course, the answer is different in different countries.
And also, in the case of Android, the Apache license that much of Android is distributed under must be considered, but it wasn't.
I'd suggest all this is a good reason legal questions should be directed to lawyers, not graphic designers.
Additionally, these specific legal questions are country-specific, and often very fact-specific. That argues they may well be too localized.