Love your observations! Spot on, have you been to china before? I live here now and deal with this on a daily basis, but I love the Chinese people anyway. Here I witnesses very similar things from foreigners.

Yes they smoke here in your face, lugie sounds follow you where ever you go (make sure you take off your shoes when you come into my house!). Personal space doesn't exist, and people are everywhere. I was surprised by the writers description of Wal-mart as it was obvious that she has not be in china more than 1 month. As it seems you would have experienced this as soon as you step out your door into the real world in china.

The down side here is I saw many foreigners do similar things to what you experienced but in ways that are offensive to the locals. I recall during the Olympics that there were many visitors from France, US and Australia. I can't tell you how many times I saw them push the locals out of the way to get to the front of the line. The yell at the counter because they don't speak french, English or other languages besides Mandarin. Then they proceed to throw their trash on the ground in front of the trash cans (well the Chinese do the same). Then it's the looks (their noses high in the air showing their disdain for the locals). While bargaining in the markets being very rude to shop keepers, (which at times I understand as the markets are very crowded and stressful).

So It does go both ways.