The Warsong dragons were never openly hostile or malicious to their human neighbors. Though they did view the humans as trespassers, it was often described as more the way one feels about finding a litter of kittens on their front porch: inconvenient, but nothing to be angry over.
While the dragons did consume many humans during the period, it was primarily to demonstrate that they were serious. Kumono was able to prevent a serious incident between the humans and dragons.
Read the Kladeth article for more details.