Absent any binding reputation system with meaningful consequences, making such a registry public would be a pretty broad abuse risk; you'd need extremely heavy moderation, distributed over a large number of people, and even then you'd just be increasing the effort required to abuse the system, rather than eliminating the possibility. Given the potentially serious consequences of being blacklisted this way, I'd be very hesitant to make a registry like this public.
On the other hand, I'm really not sure anything less would be worthwhile -- keeping such a registry, but having it be private, would I think be hardly better than nothing, in terms of actually bringing this kind of misbehavior under control.
There's a tradeoff here that I'm not sure I'm qualified to evaluate.
On the one hand, I don't really care for the idea of an industry blacklist in general, on whatever grounds.
On the other hand, I'm not having to put up with death threats, rape threats, depraved sexual harassment, et cetera ad nauseam, simply in order to try to do my job to the best of my ability.
Taken all in all, I find myself in favor of a public registry. After all, no one has to act on anything they find there, and having a solid base of information out there would give the industry at large an opportunity, heretofore lacking, to put up or shut up -- either demonstrate that this kind of malbehavior is beyond the tech industry's civilized pale, or demonstrate that the tech industry is the boys' club it's been accused of being and has no particular desire to see that change.
I'm honestly not sure which is the more likely result, but I have to say I'd be interested to see the experiment made.