Wait wait... Please don't skip to conclusions. When you look at these from a shallow level, you'd think we are disrespectful and rude. But, you didn't look far enough. You just scratched the outside.
First of all, we Filipinos are not rude or disrespectful. Yes, "some" are, but if only "some" are, that doesn't make it ALL the Filipinos as rude and disrespectful. All countries have flaws. Philippines is not the only one. Even those countries where people like migrating to. US, Canada, there in Europe, and other places. Even if you think we are rude and disrespectful, we have our strengths. We are independent, we fought for ourselves back in our history, our heroes fighting to the deaths for the sake of the country.
Second of all, don't be shallow-minded. If you look at it this way, when those group of people in the bus were noisy, it meant that they were happy and carefree. That was how we lived for centuries. We are retaining our culture. Though they didn't mind the others, it meant that they were lucky-go-happy people, and that symbolizes our Filipino youth and culture.
When your aunt went up there, she was showing that she wanted this day to be remembered through something permanent. What do photographers do? They move like, 5 feet near you to capture the moment, don't they? She wanted to cherish the moment and let it live for a long time through that picture. When your mom was laughing, it showed that despite the priest telling her to go back to her seat, in shorter words, scolding her, we don't mind and we are happy. Another example of being happy if you look at it more deeply.
Third of all, different people have different personalities. Just because you wanted a quiet bus ride doesn't mean others agree with you and want a quiet one too. Just because you thought what your aunt did was embarrassing doesn't mean it was embarrassing for her. Not all minds think alike. Get that into your head.
Fourth, and finally, don't jump to conclusions when you didn't even think about it thoroughly..