I've experienced negative racism in Hong Kong. It doesn't 'bother' me, but I'm sure the term 'Gweilo' is racist... aside from the fact that, despite how I look, I'm not a 'gweilo' by some definitions, it's certainly derogatory in some contexts.
On several occasions I have been quoted higher prices than my local friends. I suspect this has probably happened many more times than I'm aware of.
Again, this doesn't bother me, but many times I've been asked, "Where are you from?"... so I say, "Tuen Mun!"... "Where are you really from?"... I don't actually have a problem with that but I'm reliably informed that people who ask that are literally Hitler.
I can't buy shoes in my size and the shopkeepers think it's hilarious!
Before you ask, sadly, in my case, big shoes simply means big feet...
People ask me if I can use chopsticks or they're amazed when they see me using them.
Local people who I have known for over 10 years still feel the need to tell me, "This is Hong Kong."... I'm 'othered'... (I think that's right.).
The Principal at the local school I work at introduces me to everyone as American... I've worked there for 10 years, I'm British.
A police officer who was harassing us for street performing berated me, "You foreigners!"... I pointed out that I am a PR and had been here for over a decade... "Can you speak Cantonese?", he shouted back at me angrily.
A landlord once refused to rent a house to me when he found out I was 'western'.
Just what I can think of off the top of my head... oh yeah, the whole pushing in between me and my family thing, or being asked for my ticket at the cinema even though my (Chinese) wife has just showed them two... I believe these are called 'micro-aggressions'...
On the other hand, security guards offer me little resistance and I've been waved on by police after being pulled over for various minor driving indiscretions...