That’s… a little bit complicated. Ganking is part of the game, but it’s not a static part. Even the definition can seem to vary based on who’s saying it. A person’s definition might start as “I got killed by any means and I didn’t want to” then evolve into “I got killed by any means and I don’t understand how or why”, it eventually turns into “I got killed by specific means and there’s nothing in the mechanics that could have prevented it” it typically matures into “I didn’t prepare properly so I specifically got suicide ganked”, and it rarely comes back full circle to what is probably its original meaning: “I got killed by any means that I am at fault by being completely unprepared for.”
So, the word itself is problematic. Assuming the complaint about ganking is referring specifically to suicide ganking and not just a broader “I suck at this game so I’m blaming the game” there are still issues with covering it in the NPE. The NPE doesn’t get updated that often. If the NPE covered any specific tactics to avoid a suicide gank the gankers would adapt much faster than the NPE would get updated, making that information instantly obsolete.
Thus, the NPE can’t stop people from dying to suicide ganking. Also, suicide ganking is actually pretty rare… the times you’d need to apply tactics to prevent it are more nuanced than the NPE can possibly teach.
I think what the NPE could do is help players develop the support system so that when they inevitably do get ganked (suicide ganked or otherwise), it’s not a reason to ragequit, it’s just part of the game.
So your idea, I think not only it wouldn’t help, but it might do more harm than good by increasing frustration of a suicide gank by instilling a belief that it shouldn’t ever happen.