Fists can easily knock a Dilo out. There spit can help you hunt or defend you from other survivors. In groups of 3 or more they are dangerous.

A good first defensive game. Their acid attack slows all dinosaurs and can be a lifesaver early to mid game.

Alone not very affective but I once had a group of 7 and they took out a carno with easy as well as other aggressive creatures

Put a bunch of stone on them and put them on your roof on aggressive and you have a spit turret

It's better to tame a male and female to produce eggs in order to make kibble for a dodicurus or an ankylo. Those are good for collecting stone or flint and metal.