Wow! 7 pages so soon! This thread definitely hit a nerve.
The word micro-aggression - I'm not sure if it is really accurate. In many cases I am sure there is absolutely no aggression intended. In some cases it feels like, "you're on MY turf boy."
Nevertheless, it is strange and somewhat uncomfortable to be stared at or chatted up. But I think the problem with it is a lack of empathy. That is, the starer or chatter upper (upchatter?) is apparently not thinking about how the staree or chattee is feeling.
A man is at a river in a park with his kids, playing in the (clean) water. A foreigner (me) walks by. The man stares, thinking: "Huh! A foreigner! Wooowwee!" But he apparently is not thinking, "I'm staring at someone, maybe they feel it is strange." I stare back, unsmiling. He waves, grinning. He might be thinking, "I want to interact with this guy because he is a foreigner." But he is not thinking why I would want to interact with him. Because I am a foreigner? Because he is Taiwanese?
So I ignore the wave and smile and go about my business. The guy looks away and stops staring. In the end, he probably thinks I'm a dickhead for being so unfriendly. Too bad, but I am not going to interact with him on the basis that "I am a surprising, entertaining foreigner".
Was this guy micro-aggressive? I'd say so, a bit. He was in my face.