There was a family of foreigners, who very much looked like Filipinos (and they were, actually). I could spot their nationality because I've lived in the Philippines in the past 7 months and was kind of already familiarized with the way they behave.
What took me by surprise was the way the two of their kids was doing in the bathtub. I know sometimes kids get rambunctious out of excitement, but they were running around inside of the bath where there were also other people quietly bathing in. The kids got so carried away to the point where they splash the bath water to the other people's faces and remain nonchalant. These people had a very confused look, which I totally understand, but what I didn't understand is that they wipe the water off their face and just stay there without batting an eye about the kids' behavior.
If it had happened in a different country, like the Philippines or America, I wouldn't have been able to pluck up the courage to approach them, but here is my home country and knew what I was supposed to do. I could not stand for any more of this misconduct, so instead of talking to the kids, I approached the parents (just to be clear, there were two fathers; one father for one kid, and one father for the other. I think these two fathers were friends).