It is possible that most of those accusations against those casinos is true, even if all is not true, majority of it is  true. Some non reputable casinos might have indeed scammed those guys that create the scam accusation topics while some of those accusations are also a false accusations which was the fault of the gambler and not the casino mentioned. If any reputable casino on this community is falsely accused, they will definitely respond to clear their name or their representative will likely respond.