Hmm, I have to agree with you on that point. Many would try to abuse this system, but what I had in mind was that after some kind of report threshhold (something like a report to buy ratio? So if 10 people buy it and 9 report it for example) Valve would get their QA to look at the product. This might get big publishers in trouble too, take Ubisoft’s AC:Unity as example. That game was (or still is?) a mess.
My statement was direct towards in that market, not only to Valve. Resellers (in this case Valve with Steam), developers and publishers as well as the player/buyer, has some kind of responsibility when it comes to dealing with those games.
Still there are people who only buy these games because they think bad quality is funny, something I can’t comprehend.