Nick Kitchener, I totally love that thought process. That's exactly how I feel about every "problem" we encounter in our gardens.
But I also don't want to tick off all the neighbors and face possible consequences from the city or developer. It's a newer housing development, so it's a unilawn with some rock gardens. I'm working to set a good example so maybe some others will want to change that, too. And also, I'm planting comfrey in these beds and wonder if they will create lots of baby comfreys
So right now, all I'm doing is pouring my urine mixed with water and a tiny bit of castor oil over the beds (they need some nitrogen added anyway since it's just carbon right now). I don't know if it will repel them or not; we shall see. We're next to quite a bit of undeveloped prairie area, so I'm thinking now that the snow cover is gone, most of them will head on over that way.