I had a nice pair of robins pick my downspout as a nesting spot, and I really enjoyed seeing the whole brooding sequence especially seeing the little minions leave the nest and was pleasantly surprised how calm they were around me.
I made the mistake of knocking the nest down after the chicks left thinking they were done for the season, but I got a real earful from the parents and they had the nest rebuilt within 2 days and were starting a second brood when the blackbirds appeared.
The nest now appears abandoned and I assume the blackbirds raided the eggs, I will admit buying a low velocity pellet rifle crossed my mind, but it's just not worth the risk