When Mi Amigo discovered the large mirror above the bathroom counter, all was well, for a while. I kept a small metal box on the counter for him that held little play things...old jewelry, small chain, hair pins, just little stuff that he enjoyed.
Then...he started to get aggressive with himself in the mirror. One day I heard him banging something against the mirror, ran in and he had the lid to his little metal toy box, in his beak and ramming the mirror with it! I took the box away and he resorted to ramming his chest against his reflection and then fencing with his beak, I could tell he was out for blood! I now keep the bathroom door closed when he is out and about in the house.
I guess, just try and see what happens. Sounds like, not everyone has had issues with them.