That is sad to hear. On and around my home and backyard, I've had several nesting Robins (one active nest right now), Sparrows and House Finches over the last several years. I refuse to be held hostage on my own property so, like it or not, any "squatters" are going to have to get use to my existence. I carry on like normal and make my presence known and I often raise my voice somewhat to give my feathered friends ample warning. But I don't aggressively approach the nest site. It seems to work. I got dive-bombed a few times but I'm still here and they realize I'm not a threat. Having said that, when my wife makes an appearance, well that's a different story.....