Are the GCC lists intended to be open lists?

[Richard Kenner]

This is getting off-topic, but ...

    You aren't blocked because you have a cable modem, but because you have a
    dynamic IP address and hence you can't be traced back to your specific
    machine should you spew spam.

Sure you can, via DHCP logs for one thing.

    That would allow for tracing: if the user tries to spam under this
    setup, the recipient can complain to the ISP and the ISP can track
    down the offender (assuming a non-spam-friendly ISP that actually
    cares).

If what you say about nontracability above is true, then the person is
equally nontracable in that scenario since it's exactly the same problem
except with the ISP's server instead of the addressee's server.