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Re:The Web We Have to Save by the8472 on Monday August 03, 2015 @05:20PM (#9999909)
doesn't work for things like email, especially for people who get lots of previously-unknown senders.
Re:The Web We Have to Save by wtbob on Monday August 03, 2015 @07:52PM (#10000732)
> doesn't work for things like email

Which is why I was writing about Usenet☺

Controlling spam in general is a much tougher problem, but in the directed cyclic graph which is Usenet, it could have been done.