This is exactly what I am saying, we have the advantage that many Chinese do not. Yes they can make our lives difficult but ultimately we have the ability to choose whatever it is we want. If a school tries to take advantage of their foreign teachers then it is up to the teacher to say I will not accept this. If a new teacher is aware of what they can do there will be less chance for them to be mistreated.
I went to WEB Fuzhou a few years ago and was told to sign a contract with a boatload of stipulations that would require me to pay them money. If I was late or unprepared i would have to give them 50 RMB as well as other such stipulations. When asked how they would reimburse me should they fail to live up to their end of the bargain I was told that it never happens so they would give me nothing. As well for the amount of money they wanted to pay it did not match my experience. I declined their offer and left, very simple. Without the teachers they have no school, if all teachers declined their offer they would have to rethink their hiring strategy. Unfortunately they have been able to find other teachers willing to accept their terms. They will continue to operate as long as they have people willing to accept less than fair contracts. This is where the real problem comes in.
Do not accept substandard conditions ever and the experience will be better.