So, why isn't this a thing yet?

[Tigra]

Cast your mind back to the last time you saw children in a video game. I can almost guarantee that whenever that child was in the game, they were inevitably out of harms way or saved at the last minute. Fallout, for example, has children which are all tagged as invulnerable so they don't take a stray bullet. GTA avoids it entirely by not adding them anywhere. There's a reason for this, and it's not just paranoid developers. Any content which has children in it undergoes MUCH heavier scrutiny than content with strictly adult characters.

um..... Ellie from Last of Us?
Clementine from Walking Dead?
the evil girls from Bioshock?