A single tag (or a pair, for both normal consumptions) of something like [FALSE_DRINK/EAT] would seem to me the solution, if we're determined to have our vampires both not eat/drink but also pretend to do so. You could make it so that a [PRETEND_EAT] adds to the [NO_EAT] (and _DRINK, likewise), but that might lead to strangenesses with apparent gluttons who not only find time to eat (being not [NO_EAT]) but also spend extra time pretending to do so as well. If you want that, fair enough, but I think a FALSE-type tag would be more logically encompassing under normal circumstances.
In a lot of the more popular fictions about vampires, you get things like the newly vampirised people (who may or may not yet have realised what's happening to them, and if they do may or may not like the idea of what they have become) trying to eat mortal food, but just becoming ill and weak, until they are finally given their first 'lesson' in feeding by their sire, or having been reduced to the underworld of the homeless of the back-alleys ends up catching a rat and drinking from it by instinct, and from then on they 'get better', at least in a vampiric way, although never quite 'full strength' if sticking to non-sentient 'livestock'.
But in others they're fully capable of eating and drinking as normal, with blood (human, preferably, animal replacement for the more human-friendly subset and some fictions provide them with their own TruBlood-esque artificial/cloned[3] pick-me-up but with varying efficacy for long-term undead-health) merely taking the role of an "essential mineral or vitamin" in their diet, or perhaps relegated to something they only need to actually ingest once every century or so...
I have no idea which way Toady's variants are going to go, of course. I'm assuming that they are intrinsically leach-like and non-friendly in their tendencies (more Angelus than Angel, but subtly so for all that...), so not many Black Ribboners among their kind[1], or others like Doreen and Arthur Notferatu (neé Wilkins) who are vampiric by inheritance (and, in the former's case also only by marriage, and yet still has been shown to truly possess the qualities of the undead[2]) and make do with having their steaks on the raw side.
[1] Note that the glass vial that Otto carries also readily smashes as it falls to the ground along with his ashes when he ends up with too bright a flash, so it doesn't always need the nicely written instructive card to be obeyed by the accompanying reporter, subject of the photograph or other willing by-stander.
[2] Not the nightie-wearing qualities, perhaps...
[3] If the fiction doesn't have the ethical alternative blood actually be donated (voluntarily, or otherwise) actual blood but 'fenced' through some unscrupulous vampiric fronts where it's renamed as a replacement product. Something that the "Good Vampire" or other protagonist then has to discover and possibly resolve according to their own particular moral code.