Well actually only uploaders, moderators or the responsible for the thread can update it. But anyone can share a file or a link to the file and report the comment so one of those three can see, check using any AV and then update the main thread.
There is been some discussion about that in the "recent malware infection" thread but to resume all: even thought moderators are trying as best as they can to keep the files safe, some of them pass by mistake. Besides no AV can detect this method of attack because there is no virus inside the game folder until an specific event triggers and the download happen. In this case the virus would only be downloaded and executed after the day is set to 14th and beyond so until your sistem get to this date you would be safe.
In case you're feeling insecure about get infected, there is a few tips to avoid get infected or protect yourself against others types of attacks in the "recent malware infection" thread.
