This would be ok, IF you are given the option of having it on or of.
The reason I say this is because I have a friend who has a mentally retarded daughter, she loves playing my games, but she isn't able to get through the trickier parts. With something like this, her parents could sit her down with a game and let her play through without having to get up every couple of minutes to get her past the bit she's stuck on.
For that kind of market, I think something like this would be brilliant.
1 day / NSW - Exploring the darkness