[shadowgovt]

A captcha doesn't keep out harassing users; they're human, after all.

Changing the communications policy of the organization to only allow people a communications forum after they've been vetted might. That's a significant change that puts an OSS project at a severe disadvantage towards gathering support / interest. Also, it wouldn't even work in this situation; the actor in question proved willing to use every communications channel they could find to attack project volunteers.

[2h]

> A captcha doesn't keep out harassing users; they're human, after all.

its not my job to teach people how to police their own forums. nor is it the judicial systems job.

[shadowgovt]

In this case, they're policing their own forums by, having exhausted other options, disclosing the bad actor's name and warning others of the bad actions.

[2h]

so they have resulted to crime, to combat a problem user?

[shadowgovt]

Do you have proof they have resorted to crime?

What crime? Be specific. You could perhaps suggest slander, incitement to violence, or invasion of privacy.

High bar to satisfy a case for any of those three. Consider everything a private investigator could do IRL if one retained their services to track down an unknown individual; in general, none of those actions are considered criminal (though the spied-upon person would certainly wish the PI wasn't tailing them).