they are useles....equally annoying, are those who say they come to do some "good". One fat annoying australian woman told me I should not try to correct the students english, or I should not be jocular or jovial with students, I told her to piss off as I had been teaching in China for 6 years at around that time and was fluent in mandarin, and whenever she needed my help dealing with chinese coworkers she asked me to translate....then she would brainlessly say it is a good idea to learn chinese to get on, eh? Well yeah?!

They are just nuisances by and large, and need to be gotten rid off in Asia.