It is my opinion that usually it's the lanjiao lang with too much free time who write to the Shitty Times forum.
Published letters fall into three main categories: Frivolous complaints, 拍马屁 letters, a non-answer template response from an organization's PR department.
Notable examples of contributors to the ST Forum in the past: Wong Hoong Hooi, Ace Kindred Cheong, Clement Puah Neo the former SAF regular who has a retarded son.
There are more of such clowns whose names I cannot remember now.
Anyway I don't buy/read the Shitty Times now, other than maybe checking the website now and then for information on major breaking news. Even the latter is more difficult now as Ng Yat Chung put paywalls on many articles. Nothing of worth has been lost.