The NDA is not to ever be taken lightly, there are a lot of things it covers that you probably wouldn't even think of. I advise any accepted testers to ask the team in-depth about this. Even I have slightly tripped up on it in the past, to my eternal shame.
I can 100% confirm this, Deva is still shamed about it every day on the hour.
Seriously though, the NDA is no joke and I would recommend reading it in full a couple of times before signing it to any that get that far.
I plan on very carefully analyzing it in the event I get accepted to be a Tester. As I understand why it is important that Testers keep unreleased Content secret from the General Public as well as their Friends and Family. I can ask Staff Members about it through PMs here if there are parts in it that aren't clear?
Even considering potential unclear parts of the NDA I think I'll be able to follow it very well considering that I completely keep secrets when it is required of me to do so even from close members of my family. And even if someone doesn't directly say or make clear that they want something secret, if they give off an implication that they want something to stay secret I will keep it secret for them. I trust people with my own secrets that I want to stay secret and in exchange want to be someone who can be trusted as well.