There are a few instances where I can see that the current system is trying to avoid. In-game screenshots can be forged by changing the text colour of the Echo command and following the format of the chat you want to forge. However, this method is highly unlikely to even work because the special task force can just pull the server logs to verify if this is true. Third-party screenshots from Discord chats are generally difficult to verify anyway because not everyone has a Discord account, so it would be realitively simple for someone to pretend to be someone they're not.

The current system is probably the most reliable, quick, and trustworthy method for the support team to investigate any reports made by any players, but it's not that great in situations such as this. Honestly, there's really not much they can do about it unless the person involved accidentally lets it slip out in the in-game chat.