I think your logic here is more than a bit off. The DM may put all manner of things in his (and the player’s) world that don’t involve choosing the obviously moronic action. An obviously superior foe could be fought with well-thought out tactics or avoided through stealth or tricked through clever word play. Of course there’s always choice “D” – Bullrush it. Just because someone chooses to be an idiot does mean you have to entertain their delusions. The difference between a smart and instigator and a dumbe one should be painfully obvious.
It is not incumbent on the DM to not place these so-called “false choices” simply because one neanderthal thinks it would be cute to try to jump the magma pit while wearing plate mail and carrying 100lbs of equipment versus using the “optional” stone bridge which looks perfectly safe. The “Do not Push” button is simply short-hand for any foolhardy activity which any sane person (or PC) would avoid.
So again let’s not be nonsensical here.

ps: I put your antispam word in non-case-sensitive and it gave me four crash errors and ate my post. It also wouldn’t accept it when I hit Back without reloading and reposted.

And most of it happens because the players do stuff on their own and always try to get information out of NPCs that I don’t have. If they didn’t the whole story would be that some bandits attacked a caravan.

It’s cool to both be the DM and not know what’s coming up next at the same time, so everyone, not just the players, can be surprised by the story.