He can't stress it enough - that's obvious since stressing it achieved nothing.
The problem for the nanny state red-tape finger-waggers is that they have drowned the world in advisories and signage. Warnings are issued for every little thing, especially glaringly obvious conditions like wet pavement after a rainstorm. They have cried wolf repeatedly and have the brass neck to wonder why their cries are ignored.
To claim that signs 'ensure' safety is to have an irrational belief in their power. But, as this episode demonstrates, irrational people will ignore the magic signs especially when they are running with the crowd.
Liberal Nanny State sign:

To claim that signs ‘ensure’ safety is to have an irrational belief in their power
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While breezing along on the Interstate while the outside temp is 95, your in vehicle AC pumping for all it is worth, traffice ‘choked’ and that pleasant little sign
BRIDGES FREEZE BEFORE ROADWAY
Pops up and immediately gives you something to ‘talk’ about - even if you are alone.
Kind of like the old ‘Baby On Board’ sign..
I was fixin’ to ram that car in front of me but seeing as it has a baby on board sign, I will wait and pick someone else.
Then again, if one is on their PHONE or chomping down on a ‘sit down meal’ and acting like they are on their couch, all the traffic or signs in the world won’t matter.
There should be no need to post a sign to not jump off a bridge. That should be obvious. Its 60 feet to the water.
The only reason to jump off the bridge is to risk death. If that is what you want to do, sometimes death wins. How can you sue when you intentionally put yourself in jeopardy?
This should be treated like a suicide. Just because it has a low probability of success does not make it any less a suicide, because flirting with death was the whole point.