Technically, that would stop it from being legally enforceable. It's a basic part of contract law that they can't be made under coercion. If someone puts a bit of paper in front of you, holds a gun to your head and says "Sign or I shoot" it becomes legally meaningless (while still, for example, being quite handy for removing money from a bank account as your dead body slowly cools on the floor surrounded by blood).
That
might be true in our world. And yet the Wards exist. Unless you think the
parents of the Wards are the ones who have to sign an NDA regarding any secret identities their children learn. It's more likely that on Earth Bet children are legally capable of signing an NDA and having it be binding. Also note that both Vicky and Amy
did have the choice of not signing. Nobody was holding a gun to their head and forcing the issue. They read the cover page, understood what the cover page said, and then
they decided to keep reading. Here, an excerpt:
"Your friend, Taylor Hebert," the brunette replied with a smile. "That hasn't changed. But before I can tell you anything else, at least about what you really want to ask, you need to read these, understand them, and sign them." She looked at the two sets of paperwork, then up at Amy and Vicky. "Or you can pretend none of this happened, we can go back out into the garden and finish the lemonade, then go for an ice-cream and a movie or something."
Amy studied her. Taylor looked back, smiling a little, but Amy got the impression that her friend was hiding a certain amount of worry under the usual cheerful expression. She glanced at Vicky who was chewing her lip, clearly desperately curious but also cautious. They'd heard enough from Carol to be wary of signing anything at all without someone trusted checking it over.
Amy herself had signed a lot of NDAs over the time since she'd Triggered, probably more than almost any Parahuman in the city, and was very familiar with the process. This seemed different somehow.
Note that they had a choice right from the get go. They could not read and sign the NDA, at which point nothing happens. They go back outside, drink lemonade, and play with the dragonflies.
Or they could read and sign the NDAs, and see just how deep the rabbit hole goes.
The warnings under that were fairly bloodcurdling. In essence it suggested that turning the page was a capital offense if one didn't immediately sign the document. She exchanged a look with Vicky, who had accepted the other one from Taylor, her sister looking back with wide eyes, then both of them flipped to the next page.
And this was their second (and possibly final) chance to back out. The cover page clearly detailed the consequences for continuing to read and not signing. At this point, if they so desired they could have put the packets down and walked away without any issues. They chose, of their own free will and without any coercion, to keep reading. They then reread the NDA multiple times, making absolutely sure they understood what the hell they were signing. Only then did they
decide to sign. Again, nobody was holding a gun to their head and saying "Sign, or else". They weren't under duress and being forced into it. Yes, they had a warning that it basically could be considered a capital offense to
not sign after reading the entire thing, but they still had that choice and nobody was forcing them to sign.
My Little Physicist: Friendship is SCIENCE!
Better then an old MLP/Call of Cthulhu mashup game I once saw on Playbyweb called My Little Cthulhu: Friendship is Madness