For me there is a big difference between a warning vs. an area that is closed. If an area is closed I respect that but if it is a warning, I take it under advisement. I have went beyond warnings many times after considering the risks.
What irks me is that it used to be if an area was "closed" it was likely due to things like rehabilitation of the area or protecting nesting birds, things like that. Now, we have closures to protect humanity from itself. There is a reason that the average age of death at Cape Kiwanda is 19 years old; the folly of youth. That area used to be a warning but that wasn't enough to stop idiots from jumping into the Punch Bowl and then putting rescuers lives at risk when they would inevitability be called to either rescue them or retrieve their bodies.
When I was last at Cape Kiwanda the area wasn't closed but there was a warning sign. I chose to take the warning under advisement.

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© Bcaps [SHARE LINK] THIS IS A LOW QUALITY PREVIEW. Please log in to see the good quality stuff. I'm in a somewhat precarious position there. But, one of the most valuable pieces of advice I have ever received when I was a beginning photographer was to, before taking a single step when in front of your camera , to
always look in every direction. That is now ingrained somewhere in my lizard brain. And it has saved me more than once when I had been looking through the viewfinder and wanted to adjust the composition just a
smidge to the left, but before taking that step I raised my eye from the viewfinder and realized that if I took that one step to the left I would have died. It's like muscle memory now and any time I am in a somewhat dangerous location it's like my feet are bolted to the ground and I can't move them unless I am standing upright and have taken in my surroundings.
Tom Reichner wrote in post #18868181
I hate closed areas. In most instances, I just avoid areas that have a lot of area closures.
Cases in point would be Glacier National Park
The last time I was in Glacier NP I wanted to shoot "Triple Falls", made famous by Galen Rowell. I spent a great deal of time before the trip tracking down where I thought that location was and how and when the best time to shoot it would be.It was probably the one shot I was most looking forward to getting as it would have meant a before sunrise hike in total solitude which is how I like to shoot. However, when I got there the area was closed for rehabilitation. Bummer. I shot something else at sunrise, but on my hike back I saw a group of 5 people hiking back from where I knew Triple Falls was. I knew who they were and what photography group they were with (the group leader was not with them) but it really pissed me off. The sign forbidding access to that area could not have been more clear and it specifically said that even walking on the damp vegetation would damage the area to the point that it would take years to recover. But they just didn't give a Sh*$. They wanted the shot. It's people like that, that ruin it for the rest of us.
And speaking of the Oregon Coast, the below was taken at Seal Rock. I really wanted to scout the area from the bluff at the far left of the frame, but there was a large and clear sign stating the area was closed as it was a sensitive bird nesting area. Well, you can see the guy (yes, it's a guy and I know who it is) that thought getting the shot was more important than the birds.
If you want to ignore warnings, do so at your own risk. If you want to ignore closings, don't. It's unfortunate that some of these closing are meant to protect us from ourselves, but the majority are to protect the environment and the indigenous species.