I am someone who is not often harassed online, but I am involved with people who frequently experience harassment. I've been using Twitter block lists[2] and have noticed a great absence of hateful responses. This is not a long-term solution, but it lowers the number of times a day that my heart sinks. I accept any incidental losses.
The article suggests a finer brush using something like crowdsourcing. Perhaps harassment targets could pay to submit their profiles for monitoring, and the resultant block list could be made public for subscription by anyone on Block Together[2].
It would be nice to see networks take a stand against repeat harassers, but clearly people are tired of waiting around for that.
[1] https://github.com/freebsdgirl/ggautoblocker
[2] https://blocktogether.org/
EDIT: Without responses, I'm coming to some disappointing conclusions.