stop flaunting your smarts- just do what you have to do without announcing it to the world. and if ppl talk to you like you're think, you could say, "you know i'm not that stupid" or something
It appears that they have no shame when it comes to foreigners. Also, they point and laugh maybe because we are ignorant of their cultures and ways, and look funny; (yes, i've been to Asia). Or perhaps they just don't like tourists, and they think of us as intruders.