The problem (loosely stated) with a forum that caters to frequent flyers is that the views are those from frequent flyers, that is, people who have the experience to inherently know when something offered by an airline might not be right. So, yeah, in the context of someone who regularly visits flyertalk, I'd say that s/he should know better.

Looking at the OP's original post, I have to say that my belief is that the airlines aren't taking their responsibility to heart when they publish fare/route combinations. In short, they're asking for trouble. Let's face it, the majority of the flying public isn't in Global Entry, doesn't know about transfer desks/re-entry through immigration in foreign airports, and generally doesn't have the experience to even look up general information on average times before they book that to-good-to-be-true ticket.

I have, many times, seen city pairs during the course of my travels that I just laugh and say, "who are they kidding?!" I've even called on behalf of business colleagues when they show me an itinerary that relies on everything going perfectly. The reps, 100% of the time, have said it's a "legal connection." That doesn't really help when one must spend 6 or more hours in an airport waiting for the flight on which s/he could be booked.

So, although the airlines do seem to step up when things go awry, it's often not without some significant pain for the ticketed passenger(s).

Joel