The open letter demanding the health ministry to cancel Sun’s professional status is quite well articulated through. You can also take a look :)

So I here translate some interesting comments that contains interesting information. (fron ifeng, too) They pointed out the irony of political correctness in this 21st century China.

没得到满足上访，后得到解决，但其拒绝按现行地方政策、规定执行，继续上访，想走那条“会哭的孩子有奶吃”那条路，还有一种情况，上访户跟本就没有正当诉求，而他就是要上访，喜欢去北京，现行政策下地方政府也拿他没办法。这些人其实是神经出问题了，我也碰到这么一个，他总是说有人用一种遥控机器遥控他，破坏他的性能力，今天说是村里的这个人，明天又说是另外一个人，每逢重大节日，他写一个大大的冤字背着包上北京，在国家信访局门前摊开。后两种情况的人占的比例真的是很大的，我绝对没有歧视弱势群体的意思，我农村里的父母在很困难的情况下扶持我读完大学，我是农民的后代，我不可能看不起农民，但我觉得还是要讲道理的！
In fact, Sun’s words was not totally wrong, despite exaggeration. I think it’s not 99%, but absolutely more than a half. I am a field worker, and I contacted with many petitioners. Some of them petitioned because their legitimate request was not satisfied. We don’t blame them. Others of them petitioned for the unsatisfied requests, but went on petitioning even though the request had got solution, just because they didn’t want to solve it according to existing policy and institutions. They wanted to do the way as they saying “Squeaky wheel gets the oil.” Some of them didn’t have legitimate issues, but they just petitioned; they liked to go to Beijin. The existing legal system can do anyting to these people. These are mentally problematic. I’ve met one, who always said he was controlled by a remote controller that destroyed his sexual potency. He alleged this guy in his village today, but alleged another guy in another day. On every big day, he brought a banner saying “Injustice” and a pack to Beijin, opening it right before the State Bureau for Letters and Calls. A big proportion of the petitioners are the two latter kinds. I’m definately not discriminating minority groups. My parents living in village with harsh consition supported me studying in college. I am offspring of peasants, and I never disregard peasants. But I think we need to be reasonable.

孙东东确实不具备一个教授的智商,只能说是在中国唯一个敢说皇帝没穿新衣的小孩!
老上访问户的问题不知害惨了多少基层干部,浪费了国家多少财力,人力,党风民风因此而不古!
可这实话能说吗?
Sun’s IQ was not qualified as an professor, I can just see he as the only child who dares to say the king is naked.
Those senior petitioners influenced many officers, wasted nation’s momentary and human resources. Atmosphere in politics and in society is not as before!
But is this speakable?

请大家不要乱吗！应讲道理！孙教授虽说言语有点过激，却道出他敢说的话。的确有上访专业户，而且以此为生，甚至有人把它当成发财的途径，我是深有感受。还是应以法律为准绳，完善法律！不能以上访替代法律！！！！！
Please don’t be outraged! Should be reasonable! Although Prof Sun was far beyond, he said what he dares to say. There are professional petitioners, and they make a living from petition. Even some make fortune from it; I was impressed. It’s better to obey the law, comprehensive laws! Petition cannot replace the laws!!!!!

But some comment vividly expressed the hopelessness of an ordinary citizen in China and the necessary evil of the petition system in the 21st century China, even though monsters are hiding in system:

有屁用,在地方的信访都是无用功,形式主义,官官相护,去年我母亲被一家乡镇—-北流市陵城卫生院无医生执业证的医生梁淋医死,该院院长麦世杰串通北流市卫生局副局长郑建国,事后帮这个无良医生补办医生执业证,把时间提前到我母亲出事前,逃避无证行医的法律责任,我们到处上访,到了北流市政府,纪委, 玉林市卫生局,广西区卫生厅,官官相护,包庇,至今这些畜生还在逍遥法外,让我们感到绝望和愤怒.在此求助各位有正义感的网友支持指点一条路子,如能得到你的帮助和支持我们全家将感激万分.
It never works. The local petition system doesn’t work, and is formalism, and officials cover one another. Last year, my mother was killed by the medical error of a doctor without license. The president of the hospital then conspired with the vice-head of local bureau of health to offer a license afterward. And the issue date was altered to in prior of my mother’s death, so as to escape the legal responsibility. We petitioned everywhere: to the city hall at different levels, to the regional health department, but they covered one another. They are still free from the law so far. This makes us despair. I ask for just netizen to point me a way. My family will be so gratitude to have your help and support.

a complaint from a Chinese petitioner