The only danger in downloading something leaked on 4chan is that you run the risk of learning a little more about dolphins than you might have liked.
Through I'm wondering if Nintendo will try to use that as a excuse just claiming they used that material.
I'd be doubly surprised if they ever open sourced anything.
Through it's very unlikely.
But you always have that risk when downloading anything (from anywhere).
4chan is a very special place, it has many "good" people but it also has "bad" people.
(Note that both "good" and "bad" are very opinionated, which is why they are quoted).
Chaotic? Yes.
Neutral. Possibly by averaging, but I suspect that the Chaotic Evil side is better represented than the Chaotic Good.
It certainly is now that certain boards have become the very thing they used to ridicule.
I'm a huge N64 enthusiast and wanted to see the Verilog source.