here come the robins again

So last year, this robin built a nest on my porch. I don’t want her to do it again because another robin built a nest on my security light and kept attacking me every time I tried to get in my car. So guess what? Last week I opened my front door to find a nest. So I got out my broom and knocked it down. Two days later ... another nest. Knocked it down. Yesterday—you guessed it—back again. I’m not gonna let this thing beat me!

Anybody know how to keep out a robin for good?