While I would totally agree with you when recruiters are defiant against teachers based on age, race or home country, ( actually I have wirtten many accounts of my feelings to these 'recruiters' )
I do have something to say to you as to what has happened to me over the past 2+ years.

We had an ABC at our school for a number of months. In fact, he was a 3rd Generation ABC who knew less Chinese than I did. However, as we sent him into our classrooms, we had many complaints as to his origin. You see, we have a strict rule for minimum foreign teacher content. You cannot convince the public who threatened to leave our school unless you can supply us with "whites" In addition, when we tried to market him to our outsourcing department for use in Middle schools High schools and Uni work, we were met with the same resistance. Eventually he left our school, our city and our province.

Maybe these recruiters are racist, but might it also be a fact that the English learning public aids them?

Coming from Canada, I am well aware that even as a white, we get the stares and the looks and the laughter, as if we have escaped from a zoo. My first Chinese words were " Kai She Ma "