The last time I dealt with Apple's app store terms of service that was a critical part. You couldn't default people into pornography or hate speech. There had t

The last time I dealt with Apple's app store terms of service that was a critical part. You couldn't default people into pornography or hate speech. There had to be a login and an option to enable adult content. I think he'll find that even if he complies with that rule people will still leave. Forcing an opt-in for one client doesn't prevent them from sending harassing messages to others.