I noticed that both Facebook and Twitter have been questioned multiple times by the US government this year. Obviously without regulations these media giants cannot even survive a single day! However if they try to play the role of information screening, these media giants de facto play the roles in our society to block and screen useful and meaningful information, and misconduct. This is like law-enforcement personnel commit law-breaking activities. A recent case is that many of Donald Trump's twitter messages were marked as "This claim about election fraud is disputed" and he may not change this by commanding "You're fired", because this act of blocking and screening is protected by Section 230 of Communications Decency Act. For the US society, it hurts but there're still no better solutions to preventing cheating, by presidential candidates or social media platforms.