Anti-trust law is a far cleaner way to approach that, with far fewer unintended consequences.
Not the definition of Anarchy I would use but I was understanding you had used anarchy == chaos
The process of doing that involves investigation, subpoenas, and warrants, and is subject to laws created in a more or less democratic process. No part of it requires anyone to prevent me from sending illegal emails, just an apparatus to punish me if I do.
E.g. see https://www.antitrustinstitute.org/work-product/antitrust-en...
Rather than proposing a new technological solution to the problem ("platforms to protocols") which may work but is unproven, we could simply restart the use of existing tools that have been proven to work. This has the advantage of being a strategy that can be explained to non-technical folks.
The "existing tools" have been proven to have a major weakness, namely they can be neutered by regulatory capture. Unless you can get everyone to magically forget how they circumvented the rules last time, you can't simply restart using them.