五毛党 (from Chinasmack.com)

[wǔ máo dǎng / wu3 mao2 dang3]
noun.
People who are allegedly and secretly paid five mao (50 cents RMB) per post/comment that praises, supports, or defends from criticism/attack the country, government, or Communist Party. Netizens who are very nationalistic are often accused of being part of the “50 cent party” spreading propaganda or “guiding” public opinion.

As far as myself and many other posters can see, any attempt to criticize a shit school will be fought against viciously with posts written in various levels of Chinglish, using methods that can be described as being very similar to posters on Chinese message boards. They will attempt to discredit those that criticize the status quo and post messages that not only defend, but praise the offending establishment, thus swinging opinion in the manner of a 'wumao.'

We've seen the same pattern for years.

It is not clear whether most wumaos on this board are unofficial ones that merely imitate true wumao tactics that they have seen elsewhere on the behalf of a school or wumaos of a more official nature; people who have been asked by corrupt officials with interests in certain schools (especially public universities of a shittier nature). But there has been reported evidence albeit of a slightly questionable nature regarding the possible presence of wumaos on sites that are frequently visited by expats (I've posted about this before) - http://chinadailymail.com/2013/09/19/china-targets-foreigners-through-expat-websites-3/

Unfortunately, as much as the more honourable teachers on the site may wish to merely act in the best interests of fellow foreigners in China, they could be unintentionally damaging the reputation of China as a country (although I would argue that it is shit people from China that are actually responsible for damaging China's reputation, not those that tell their story afterwards).

[edited]