@JohnRennie It is possible for CMs to dig around and find out who's issuing flags. Elected moderators also can, under certain curcumstances. (
meta.stackexchange.com/q/280986/311001 has the details). That said, I believe it's an absolute waste of time for anyone to dig around like that. If that's necessary there's so much other, fundamental work that a room needs... it'd be putting band-aids on a severed limb.