The average person doesn't host a pool parties 100+ days out of a year as an Airbnb unit might. Filing complaints against a single noisy neighbor would also be a lot easier than doing it against people who will be gone by the time anyone looks into the matter.
The people behind me have done it a few times. How can i tell they had "guests" over?
I find beer bottles, coke cans and garbage on MY property. There is the obvious noise from the late night "pool parties" as well.
Normally people dont care what their neighbours do, but when it starts to impact others, people start to care.