Auggie gets no people food at all (though I firmly suspect my dad slips him cheetos and potato chips.) It's not health reasons or anything... just that I don't want him to because I don't want him to learn that me eating = table scraps later therefore PESTER ME WHILE EATING.
My sister's dogs learned that after she and her (now ex)husband were done eating they got to lick the plate/eat the leftovers... so now if they're around while you're eating they will stare you down. Happy will whine and cry at you while eating, complaining for you to hurry up and share your food with him already. =P It's even worse with potato chips or cheetos, which my dad would throw down to them.
Auggie has gotten bad about the potato chip thing because my dad "drops" chips on the floor. (Drops. Right.) So now if you're eating anything out of a bag or a box, like a cheeto box, he'll start orbiting around you looking at the floor. Argh. X_X It drives me crazy.
But as long as your dogs aren't turning into little pests over it, and your being healthy about it, I don't really see a problem with it. I think a lot of people struggle with the weight gain problem because they lose track of what the dog is being fed from the scraps... like if there are four people in the family and they're all feeding the dog a little here and a little there, you know? Or they're just not smart with it and don't give the dog a bunch of scraps in the first place.