[johnklos]

I agree with many other takes here: this person really is getting too worked up, and therefore should take a break.

On the other hand, it seems the issue that was the straw that broke the camel's back is saying that ICMP equals access, and access could mean just ICMP to some (I can access this thing via ICMP), or access could mean full takeover to others (now I know it's there, and therefore it's exploitable to anyone with time & energy).

It's really stupid to get upset about self-proclaimed security experts arguing about stuff where they haven't even clarified what they're arguing about.

Honestly, though, it's a non-issue. Some ISPs use RFC 1918 addresses, and some of those addresses are reachable (via ICMP) from consumer endpoints. So what? That's no less and no more secure that any other set of intermediate hops in ISPs' networks.