When making a chat report, you can add/remove messages that were/weren't in the original conversation

When chat reporting a player, it's up to the client to supply the chat log. Due to this it's possible to use a modified client to remove context messages, or, because you have your own private key, add messages that weren't in the original conversation.

For example, you can turn this:

_{Player1: Are you at my base right now?}

_{Player2: Yes}

Into this:

^{Player1: Are you <bad word>?}

^{Player2: Yes}

Which, depending on what you add/remove, can get Player2 banned.

In fact, people have already made mods to do this! (https://github.com/nodusclient/gaslight)