Thanks to a post by Luca Sartoni on his Facebook stream, I got to know the result of this Electronic Frontier Foundation‘s research on the topic:
This is the premise:
When somebody wants to silence speech, they often use the quickest method available. When the speech is hosted on a major online platform, that method is usually a copyright or trademark complaint. For many years, EFF has worked with people whose lawful speech has been unfairly targeted by these sorts of complaints. We’ve observed that some approaches tend to work better than others in preventing that sort of deliberate abuse, as well as the casual censorship that comes from haphazard and dragnet approaches to policing online infringement.
Read carefully the rest of EFF post & report!