Pan samochodzik i templariusze

Frist of all. For anyone who doesn't know what long term nuclear warning messages are:

a series of different concepts, all with the purpose of making whoever will be on earth in the far future (10,000 years or above) not fuck with the atomic waste buried in the ground. The concepts include a lot of creepy, very hostile architecture (landscape of thorns is the most popular one) that would in itself suggest that you should NOT be here, and also make the land unhabitable. They also should include some kind of written and illustrated message explaining why the place is so dangerous,(assuming that future civilization will be able to read it). Here is what feelings a message and everything surrounding it should invoke:

The messages should over time increase in complexity in this order

both photos are from the Wikipedia article for long term nuclear warning messages

Now, the backrooms. They're above everything very hostile, anyone would probably have the feeling that they SHOULD NOT be here after entering, they are a maze very clearly dangerous and unhabitable for humans. but despite that they can serve as an archive and proof of our existence, since they are full of various human paraphernalia and have the golden record constantly playing on repeat. This in itself is very nuclear waste warning to me.

Now getting to the established wearing messages I showed earlier

"something man-made is here".

When Clark enters the backrooms the first thing he sees is furniture. People all around the world use furniture, it's one of the most univerally understood man-made things. It's VERY important for nuclear waste warnings to be understable for as many people as possible.

"Something man made is here, and it's dangerous"

ignoring how weird and scary the backrooms look by themselves, the thing you see after wandering for a bit is, a stop sign. A STOP SIGN!!! Stop signs are purposefully similar all around the world. Even if you didn't know what "stop" means, a red octagon is used in many countries to indicate the same thing, if not an octagon just a red sign!!! Almost everyone will have some sense of "maybe I should leave" after seeing a stop sign no matter where they're from.

"what, where, who and how" and complex information

is what the researchers and Clark are trying to gather. Clark especially as we see him making maps

"Sending this message was important to us. We considered ourselves to be a powerful culture."

the golden record playing constantly by the caveman cutout

"The danger is in a particular location... it increases towards a center... the center of danger is here... of a particular size and shape, and below us."

the further you go the weirder and more dangerous the backrooms get. They're also below the store and the montage showing Mary's old house turning into a part of the backrooms looked like it being swallowed by earth, going lower and lower. The danger is below us

"The danger is to the body, and it can kill."

Backrooms are obviously dangerous but the still life are essentially human bodies changed in some unexplained way. There's also a theory in the reposts about capitan Clark being the real Clark, which would tie very nicely to this

"The danger is unleashed only if you substantially disturb this place physically. This place is best shunned and left uninhabited."

yeah