Ja, jag tror det. Du nämner Apple, och att du vill ha appen i Apples App Store, då hittar jag detta direkt:
1.2 User-Generated Content
Apps with user-generated content present particular challenges, ranging from intellectual property infringement to anonymous bullying. To prevent abuse, apps with user-generated content or social networking services must include:
A method for filtering objectionable material from being posted to the app
A mechanism to report offensive content and timely responses to concerns
The ability to block abusive users from the service
Published contact information so users can easily reach you
Om du inte känner att du har lust att bygga allt ovan så tror jag att du bör skippa den där idén med en chattruta.