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.

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.

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.

im my youth in barcelona it was quite common to throw a bucket of cold water towards the noisy drunks. This usually solved the problem quite well (at least, when i was among the noisemakers...)

I've only been in Madrid and Seville and Granada (from the states), but that sentence looks like Portuguese to me. Does Barcelona speak a different dialect of Spanish or did you just type out a Portuguese sentence?

I don't know enough Spanish to talk to that, but its definitely not Portuguese.

calleu d'una puta vegada

There is at least two words, calleu, and vegada that don't exist in any Portuguese I've encountered. Also, d'una is... not something I've seen in Portuguese before.

But I'm a new speaker so I may be missing something.

I found this slang for shut the fuck up in Portuguese, not sure how cromulent it is: https://en.bab.la/dictionary/english-portuguese/shut-the-fuc...

Definitely not Portuguese, you're right (source: I'm Brazilian.)

Thought as much, not enough a's at the ends tripped my spidey sense. >.<

It’s Catalan

They speak a lot of Catalan there so perhaps it's colored by that?

It is not "colored by" catalan. It is grammatically correct catalan.

Sweet. I've only been around the area enough to know they speak Catalan, not enough to recognize it when it's written. :)

It’s one of the dialects of Spanish they speak there.

Do you consider Portuguese to be a dialect of Spanish?

It’s actually quite the opposite IIRC

Well that would be a pretty noisy thing to do, yelling, that is