I thought the same thing when the Doves started hanging around my house. Their shit is very similar to pigeon shit. They wore out their welcome when they started shitting all over my deck in mass. I bought a couple water blaster cannons from Amazon and put a bucket of water on the deck. I declared war on those flying shit machines. Every time I heard them cooing, I was out in a flash with cannons gushing streams of water on those shitty varmints.
Even considered taking up falconry when I observed one of our local falcons dinning on one of the Doves. It only took a couple weeks of persistent blaster work to get the local Dove population to consider my house a no fly/roost zone.