Personally I think it's partly solvable with a combination of cryptographically signed HTML elements and a web of trust similar to Raph Levien's https://en.m.wikipedia.org/wiki/Advogato or https://keybase.io/
But it's going to be a big piece of work.
teaching people to be better is the only way to avoid oppressive technical measures. because most technical measures will end up being oppresive at least for some minority or corner cases that don't fit the expectations.
i also fear that technical measures have a tendency to get in the way of diversity as they force the same behavior on everyone and punish or prevent people doing things differently.
part of the education needs to be moral education, starting from childhood, about what is good and bad behavior. good rolemodels, etc. we will never completely eliminate bad behavior but we can reduce the likelihood of it occurring by teaching everyone about good behavior.