Ok... here we go...
Developers often hide the resources their games use for proprietary reasons. One of those being they don't want this kind of thing happening.
I think the best way to look at this is as a game developer. That shouldn't be a big stretch, as most everyone here has had that aspiration, at least once.
So, as a would be developer, ask yourself, do you want the people who rip this stuff, then ask for credit like a dog pissing on a tree to mark it's territory, and threaten bodily harm if that undue credit is not given, to take a dull cookie cutter to your creation, your blood, sweat, and tears?
Any way this is just my personal opinion, yours may differ, and surely there are exceptions to this, as even I understand the meaning of homage, but there's a couple sayings I'd like to point out in this case.
Do unto others as you would have them do unto you.
and
It's difficult to soar with the eagles, when your surrounded, by turkeys.