In my last game against them, they did nothing for a while, then one turn then they shot all my helipads to death. Then I rebuilt them and killed some more of them with a lot, a lot, a lot of clicks...and by the time I was done killing their front-liners they had spawned another dozen of their white bastards all over the place. Then they killed my new helipads, I rebuild them again...
...clicklickclickclickclick. So much clicking, so little effect other than annoyance.