Picture a lovely BBQ in a nice garden, sitting round the table. All the food is in the centre of the table.
Would you consider it bad manners to start loading up your plate esp with say more than one hot dog at a time?
DH was acting like an underfed teenager last night and I called him out on it. Even if you are hungry and can see there is probably enough for you to double up, I think it is rude and sets a bad example to the kids to load your plate to the brim..