Looking at this questions led me to think that a flag should be introduced that marks questions / answers that describe dangerous behaviour, especially since the site promotes usage for amateurs.
Being a trained mechanic I know what bad things can happen during certain procedures, but I doubt an amateur could always guess all the dangers, same as I doubt that an answer on this site will always include all things that might possibly go wrong.
Of course it shouldn't be used to flag "use a hammer" because "one could hit one's fingers", but in the linked question people were discussing how to drill holes into a tank filled with diesel. 3500ltrs of diesel. So strict guidelines for its applications would need to be set.
The community needs a way to quickly close or even delete these questions, so that SE / HI can distance itself from such risky behaviour.
Also, if it is possible to win a lawsuit against mcdonalds for burning oneself with coffee, I see legal risks. You can probably imagine 100s of scenarios.
Alternative rougly based on Mołot's comment:
Similar to spoiler-tags(markdown-tags in this case), that hide the embedded area until explicitly clicked, like other websites have them:
Before/When clicking they show a disclaimer "I understand the desribed behaviour is dangerous and that I alone bear the risk for my actions".
Additional info in relation to the posted duplicates: