hm. i used to have what you call "genuine issues around food" for a long time, and reading you, i wonder: if you are aware that you pick these up from others, why do you act them out?
no offence intended, i just wonder – for me knowing that some feeling isn't mine usually helps me stop acting on it; sometimes it's enough to ground it in a way.
so this is puzzling for me.
for me to get out of the eating issues, i needed to learn to pay attention to the underlying emotions triggering it – what i feel right before i get the urge to binge; and then slowly learning to tolerate it and to have compassion towards it, and to simply fulfil the real need that the emotion is pointing to (rather than substitute with food).
i've also had to adjust my diet quite a bit, as part of the imbalance in my opinion was related to blood sugar rollercoaster (easy to get when you eat a lot of carbs).
so without wanting to intrude into your personal space, but i wonder – if you pick up on this to the degree that you actually find yourself acting it out, might you have a shadow / echo of something similar in yourself: some pain that is easy to cover over with food, even if it's by going via other people's patterns / getting covered over by other people's patterns.
because in my personal opinion, otherwise you might sense this urge but you it seems unlikely that you would actually (sometimes) act on it.
although, if it's really 100% other people, i would think the solution is similar – realise what emotions come just before the urge to binge, and learn to tolerate and ground those (when they are others' just the same – see them for what they are).
in my experience, these will typically be ... anger, overwhelm, emptiness/boredom, lack of love, nervousness, diffuse (emotional or physical) pain and discomfort that needs to be listened/attended to, inner agitation (again, find the reason and solve it) or others.
food can act like a soothing drug for these – makes you feel them less for a while. whether it's triggered by another person or not.
i hope this is somehow helpful and not offensive, just from my personal experience.
don't diet - that just gets you deeper into the problem. if you're able, pay attention to the emotions that come before and learn to tolerate / befriend / ground those and distinguish them from physical hunger, and then the thing will start to resolve hopefully.
all the best