Swarm of Artificial Flying and Cooperating Robot Insect

This week I came across something that renewed my old dream to build, one day, a swarm of robotic flying, cooperating, self-sustaining insects. A dream as close as old-fashion cellulose. Apparently, cellulose is piezo-electric, and the pictures they show have a bonus - the insect is my favorite dragonfly (ok, perhaps dragonflies are not insects but they are super-cool)

The article describing it is here, the dragonflies are in a blog here.

What is boring about all these is everyone get immediately excited about a military use of those things. Can nobody think of a peaceful use? Protecting crops from insects? Monitoring wheather? Hey, swarm, get me some water , each a drop, into my glass :)