There are also semi-regular posters who are resentful because they can no longer obtain legal employment in China. Either they are unable to produce clean criminal background checks from their homelands, or apostilled qualifications, or they have been banned from China for behaving immorally/teaching illegally in China.

Of course, they will keep those negative things about themselves secret. However, they will slate China time after time on this board in order to discourage jobseekers from accepting positions as FTs in China.