Again, we already get all of this with real names and the existing legal system. This is really what a legal name is! Its a "pseudonym" but with enough linkage to the real world that its costly or impossible for someone to abandon it if they do something bad. Why not try to think a bit more about what systems already exist and how they help us before cheering on a new way to reinvent them poorly? I'm not suggesting the author is a criminal, all im saying is we as a society have always needed to build systems to prevent criminals from taking advantage of them, because they will. We all use email providers that block spam and sign contracts for jobs/rent too - its not because i think everyone who emails me is a scammer, its just that some are and this necessitates making the system resilient to them.