Update: Nov. 23
I see that the Verge has an article Oct. 22 by Makena Kelley. Hoeg Law discusses the Verge story here and compares the risk of troll abuse to DMCA abuse today. But he maintains we should improve the law, not avoid it just with friction. Again, the main risk for some users, especially bloggers with large backlogs, would be that some innocuous practice largely ignored in the past out of practicalities, is declared by the Copyright Office not to be covered by Fair Use and invite massive trolling. Expect some controversies and comment periods in early 2020 after the Senate votes. Note the picture above, at Independence Ave and 1 ST SE, near the Supreme Court, near the South Capitol Metro stop, where the actual office for these "tribunals" is located.