DNS server feeding a bogus IP

I saw the following in another news group.

"Not to mention when you trust your ISPs DNS server you open yourself up to being mislead even if the DNS server isn't compromised.

This is especially easy to do in most cable-modem networks because the entire neighborhood is on "broadcast" where everyone in the neighborhood sees all the traffic from each other.

Here's a scenario, your neighbor has his box set up to listen for your dns requests going out. When his box sees your request go out it crafts a response that looks like it is coming from the DNS server feeding it a bogus IP, thus redirecting your computer to the wrong IP. "

Is that true on a DOCSIS cable network?

My Motorola SURFboard sb4220 modem status page shows the Initialize Baseline Privacy Done which I thought encripted the packets passed through it.

Now that I think about it, if it encripted the packets how would they get where they need to go?

Nope, you cannot see other user's upstreams - cable modems do not have

receivers for the upstream channels.

That was only true nearly 9 years ago, and in CT! It is not true anywhere these days.

That would only be possible on a LAN.