What are you doing here, white man?

There's a lot of barangs (slang for whites) around. I have so far created the following groups of whites here:

1. Tourists
A. Americans (not too many)
B. Europeans, particularly French and German
C. Aussies
2. NGO & UN types (lots of these)
3. Crazy old vets (often married to locals)

and then the slimeballs
4. Dirty white men (i.e. sex tourists)

I know as time goes on I'll be refining these groups, but there's so many shady looking white dudes at the cafes that I want to do whatever I can to look legit.