Group 1 is "just the facts ma'am" And nothing you are saying is wrong. You are all about the truth and the facts and the law. I get that your idea is to make the unaware more informed. I completely understand that.
Group 2 however is not talking about the rules, laws and facts. It is parents with children who are saying "this is stupid"...not that group 1 is stupid- but that the airlines saying "a 3yo is old enough to fly in a row with strangers is ok"- is stupid. Sure the rules and laws say that nothing is guaranteed, but I think it is still stupid.
And there's Group 3, who knows that those are the rules, has kids and knows that crazy things CAN happen, but doesn't care to *worry* about it.
If something silly happened like DS being seated away from us, I'd stay calm and explain the situation.
DS cannot have many things they serve on planes, but even at 5 he knows to NOT EAT things unless he absolutely knows they are OK. He isn't reading yet, which means he doesn't eat anything that I don't give him. Oh it will be nice once he's reading!
He adores chatting with adults, unless they creep him out, and he tends to follow the signals of adults well in terms of how talkative he can be (the signals of fellow kids, not so much). Even if I couldn't get it worked out before takeoff, I'd just do my best to explain it to him, give him the snacks I have, make sure his Earplanes are in, and expect it would get worked out once we were at cruising altitude.
IF for some reason he got really freaked out by all of this and cried...well honestly, I expect it would be worked out even quicker by the time we were allowed to move around...
(Despite my rep on the Dis), in person I'm actually a very chipper and smiley person, and I LOVE flying (except for when there's turbulence, then I just want to have my own freakout and scream and cry and faint), and even though on our last flight my son actually threw up* 5 seconds before the seatbelt lights went on for descent (horrid situation, I tell you), the people around us were wonderful and sweet and gave him gum and sweet smiles and accepted the apologies I was repeating over and over and over... So I am quite sure that there would be someone on the plane who would be happy to help us out by swapping seats, if for some reason we were separated.
But since I do check flights online often, to make sure things are as they were the last time I checked, any changes made would likely be fixed before getting to the airport. And we almost always get to the airport hours early, so there's time to fix things there. I don't like surprises, so I do my darnedest to make sure everything is as it should be.
As a member of Group 3, I just do NOT see the point of worrying ourselves sick over all of this!
*he was overtired, had been sick but got better before our trip, then got sick again during our trip it turned out (though we didn't know it until pretty much that moment), then he thought he lost an Earplane just before descent and was scared of the ear pain he thought was coming, and all of that caused a huge crying jag which then caused him to throw up. On my husband.