I’m sure the developer thought this was a great idea for an app. Allow people to pass comments anonymously e.g. for sending anonymous feedback to your work colleagues. The problem with this idea is it can be used for bad as well as good.
I was invited to sign a petition to stop this app which has now been taken down
As a developer you should always consider how people with negative intentions will use your app or service.
I don’t think we can expect Google and Apple to decide this for us (at least at the point of release).