When you pass off as a local. In Canada it's being white and not having an accent.
They are totally a safe immigrant no one would tell them to go back home.
Water filter - in a straw! Prevents bali belly, gastro and all those other lovely experiences when travelling. Protects against giardia, cryptosporidium and more. Filters 99.99% of water borne bacteria.
I used an aqua safe straw on my recent trip to Bali, my mate didn't. He spent three nights on the toilet - I didn't!