Holds breath obstinately

Radio Broker and Electro-Choc were ridiculously influential on my later music preferences.

Regarding your first point, I think there’s more harm mitigated than rehabilitation opportunity lost by quarantining and thus limiting the outreach potential of extremists. The saner, less edgy parts of the Internet are easy enough to access and these people will come across them in due course if they are in a receptive mindset. Whereas I am completely comfortable making their weird little dens of groupthink harder to stumble upon by default.