We'll if you scatter the food around, they will find it at random. They are not going to get in a frenzy each time they find a bit. Its more natural as well, as when wandering around in the wild they would randomly come across a piece of food every so often.
I scatter food all around my tank, it keeps them occupied longer and makes them use more of the tank (plus it makes them more fun to watch!). However I dont think mine would have this aggression anyway though.
The only problem with scattering it is that some newts are greedier than others so will likely find and eat more, to help with this, tweezer feed some food to the smaller ones before scattering the rest.
Im sure there are more experienced owners out there than myself that feed differently, but I like this method and it works well for me.