[namaemuta]

You shouldn't recommend people to scream to a group of people "Shut the fuck up" because it's not only unpolite but it can be the source of a lot of problems for that person. Be considerate with your recommendations and aware that you could cause problems to others with them.

[6t6t6t6]

In Barcelona, "Calleu d'una puta vegada" from a balcony, late at night, is not something that can cause a problem.

What would probably happen is that the people being noisy will appologize, try to be more quiet, forget about the incident after about 5 minutes, and go back to the previous amount of noise until some other neighbour complains.

[namaemuta]

First, it was never stated to do that from a balcony so how would have known that the person to whom it was suggested? But leaving that aside, can you grant me for sure that there won't be any problem? for every place in Barcelona? what about if they people making noise aren't Barcelonian? what if they are too drunk and make even more noise? what if they recognize the balcony from where you screamed at them and start to throw you things as retribution? or ringing at your door? The possible developments of that situation are so many that you can't lightly ignore them, specially when it's another person the one who is going to be in that situation.