How do I create a user-reporting system in multiplayer games?

The reports for innapropriate usernames will get sent to me, then if the report is accepted the player is not allowed to access the game again.

Sorry but I REALLY need help, someone please help me!

It's a difficult problem. You will need a backend service, an account system to provide logins, a reporting system that feeds in to that, a system to ban or otherwise moderate accounts that violate the moderation policy, and people to keep reviewing it regularly.

By far the easiest solution is to not allow players to do anything that could violate a moderation policy. This is why many games auto-assign usernames and avatars, or only allow choosing between combinations of pre-set values, and only provide pre-set messages for player chat.

It's a difficult problem. You will need a backend service, an account system to provide logins, a reporting system that feeds in to that, a system to ban or otherwise moderate accounts that violate the moderation policy, and people to keep reviewing it regularly.

By far the easiest solution is to not allow players to do anything that could violate a moderation policy. This is why many games auto-assign usernames and avatars, or only allow choosing between combinations of pre-set values, and only provide pre-set messages for player chat.

I like that "auto-assigned username" thing! I think I'll create some preset options, and players can request a special username by email which they unlock using a password.