Corrected entry: Towards the end of the war the town is attacked by US aircraft. The siren goes off unrealistically late, when the planes are already over the town and the first bombs detonate. (00:53:20)
Malèna (2000)
1 corrected entry
Directed by: Giuseppe Tornatore
Starring: Monica Bellucci, Giuseppe Sulfaro, Luciano Federico, Matilde Piana, Pietro Notarianni
Continuity mistake: When the advocate announces to his mother that he intends to marry Malena she gets mad at him. When he runs down the walkway she throws first her stick after him, then her shoe, but if you look closely she is still wearing both her shoes. (00:51:00)
Renato Amoroso: From now on, I'll be at your side. Forever, I promise. Just give me time to grow up.
Correction: When it comes to airstrike siren warnings, if the air bombings are fairly frequent in one area, the sirens usually go off only if there is certainty that the aircrafts are actually moving towards the region the warning is given. Of course then it might be too late, but it's better than giving a warning every time the airplanes are seen, since the people get used to them and start to ignore them, which can be deadlier than giving a "late warning". To put it bluntly, no, it isn't unrealistic. It is actually more realistic than you would suppose.