Concerns about useage of 3rd party applications

[MilkieTea]

So theoretically I could report him on suspicion of using third party tools in order to deliberately grief other players, that could classify as warrant for investigation.

Not really. For usage of 3rd party apps they’d need definitive proof - him saying so ingame - and they’d need proof that he is using said tools to grief others (since they don’t seem to have any issue with the usage of 3rd party apps in streams where they and the player character are both clearly visible.)