If you really believe maybe this may be a cultural misunderstanding, perhaps leave an anonymous note explaining the city noise ordinance (in basic terms) and asking them to please be a good neighbor and refrain from excessively loud parties and parties after quiet hours. Maybe they won't care, but if it is truly just a case of not understanding the cultural (and legal) expectations, it might help. I don't see how if could hurt.
In other circumstances I would agree, but probably not immediately after shutting their party and getting 70 to 80 cars ticketed. There may be a better opportunity for outreach when things have settled back down.
Seems to me the offenders just received 70-80 such notes, courtesy of the city.
They got notes about parking violations, not noise ordinances.
[Fixed quote for clarity.]
Yeah, I get that. What I actually disagreed with was the "anonymous letter" part. Having no wish to be confrontational, I reached into the humor arsenal.
The offenders have received communication from the city. If the parking violations are not enough for them to get the message, then GS could go to the city, reference the prior parking violations and explain that the noise problem is recurring. This is more likely to have an impact than an anonymous letter, IMO.
You have a different opinion and no one's saying you're wrong.