Do you find the dangers and precautions biologically or medically implausible, or do you find it implausible that the social danger of appearing to be weird is worth the risk of sharing?
The “breath through a 20m pipe” part isn’t going to work: all that dead space will (literally) kill you.
Depends on whether you breath in and breath into the pipe (which is not ok), or just breath in from the pipe, and breath out elsewhere (you will need some valve that will regulate the flow here).
No, I think the issue is that your lungs can’t generate enough negative pressure to respirate effectively through 20m of pipe.
They're not underwater. It doesn't take much pressure just to move air through a tube.
I assumed they were going to put a fan on it because otherwise it would be hard to even get a breath in, even if there was a check valve for exhaling.
I find it funny that trying to be safe, the alternative is to do something that will probably kill you. Respirator/Ventilation should work perfectly fine
Once I welded Galvanized pipe and I was sick for a week, I drank a lot of milk to counter that which I learned from my welding instructor
The sickest I've ever been was cutting/torching galvanized pipe and fencing in our poorly ventilated machine shed. I opened the doors to let most of the smoke out, but geez is that stuff aggressive.
We hammered milk afterwards to try to get rid of some of the symptoms, but that sticks with you. It's hard to describe, because it's an illness that isn't really like anything else. It sucks.