Delegation of such capability to fmods is not feasible IMHO, since the UK Data Privacy Law prevents non-employees of a company from viewing/accessing customer data. This sounds like an excuse to avoid having to do anything.
I have witnessed a Fmod telling someone on Forum Help not to hide behind his alt when reporting flame posts baited by his main. I can screenshot it and post it here with names blanked out if you wish.
Louiellen isn't arguing that the rule isn't feasible because of this reasoning. She's arguing that extending Fmods abilities to that particular suggestion is against the UK Data Privacy Law.
Unless you're telling us that the Fmod is suspecting of using a third-party tool to reveal their IP address - which is serious.
Other than that, using common sense to identify that a perpetrator had used an alt and warning that alt in that manner is not unreasonable.