Earlier quoted context omitted.
In D&D there is a certain type of spell called Power Word Kill which works slightly differently based on the version of D&D you're playing with, but the effect is that it essentially kills a single individual with a single word. I'm not saying phosphorus should be legal or illegal, but at some point "it's just a packet I sent on the internet" or "it's just a PDF I sent to someone overseas" or "it's just an element" m…
Deciding what is fundamentally good or drawing the line (eg the glassware) is the muddy part. The road to hell is paved with good intentions -- next thing you know, science chemistry kits are illegal & large swaths of population no longer believe in a spherical earth, evolution, and climate science.
The ones after 1970 were like "hey, watch salt dissolve in water."