Another possibility: Twitter and Facebook have become aware of skulduggery in progress that we don't know anything about yet, such as a plot centered on the inauguration ceremony on the 20th, and don't want anything to do with its participants.
Facebook in particular will obviously be the first to know about any such plot, long before any intelligence or law-enforcement agency. Twitter wouldn't be far behind.
Facebook in particular will obviously be the first to know about any such plot, long before any intelligence or law-enforcement agency. Twitter wouldn't be far behind.