I have no need for that, because I am an old male. But I have an idea that modern phones and/or social network are too fit to female needs and point of view, (I am called a misogynist every time I speak like this) and your feature can deliver a good use for a woman who wants to leave the friend's house and other situations from your list.

O tempora o mores - I don't want to be a friend to anyone who needs a fake impression of an incoming call with a fake speech to a fake interlocutor.