Well, you didn't qualify your original statement. So, if I hear 3 people making a whole load of racist comments in a bus, but not directed at a specific person

Well, you didn't qualify your original statement. So, if I hear 3 people making a whole load of racist comments in a bus, but not directed at a specific person, should I ignore it? I'm Indian by birth, and have lived through a lot of racism. I'm not inferior, and I would never have gone begging for help, but I'd sure have appreciated people intervening at times, even when I wasn't under direct attack. In the UK, women are typically paid 15% less than men for equivalent jobs. Should I say nothing about this?