As long as the others aren't taking in something harmful to the body (ie: foods the body is alergic to, drugs, blood from someone not on our "approved" list, etc...) I pretty much let them eat what they want, when they're front.
We had to define what something harmful to the body rather specifically in our case because we have members in our system who would happily live of raw meat and blood, as well as members who'd eat just about anything.
In your position, I wouldn't change my diet for the others in my system, anymore than I'd expect them to change theirs.