The article doesn't say there are crimes on KF, only that KF "provides a forum for gamifying abuse and doxxing". Magically, that abuse just happens without any planning of it appearing on KF, and then KF's users gossip about the results openly. The article says it supports prosecuting those missing-link people for crimes: "we fully support criminal and civil liability for those who abuse and harass others"

It does think companies should act on illegal speech; those "companies" are the people/orgs who run websites, like KF. "We should enact strong data privacy laws that target, among others, the data brokers whose services help enable doxxing". The EFF doesn't think other companies (network carriers, etc.) should act on illegal speech.

The government ought to take a more active role! Would you prefer the courts to affirm your legal rights, or for an oligopoly of private companies to brazenly deny you them, with no recourse?