Dangerous? No, QUITE dangerous. Like gas welding. Like crab fishing in the north sea. Like driving in L.A. or living around three mile island. Do you think that any of the processes involved in the magic making of meth are totally without risk? Have a flash fire or a flask explode in your hand, and you understand just how dangerous cooking a lil dope gets. Personally doing pulls ala straight to E if done without key ventilation, and anywhere near sparks or pilot lights overlooked, is my idea of a bomb that can kill instantly. THAT is why safety is so fucking important, and cannot be overstated. Common sense is a tool of the succesful cook and of the DIYer. If you play with fire you can get burned, that why you wear protective gear made for those who might have to play with fire. You get the equipment that makes it safer to be manipulating that fire, and you keep your wits about you, instead of being an idiot. The idiot will learn the hard way, and/or become the example for those who use knowledge to thier advantage.
If you want to bake some cake and cookies, ya gotta bust open some eggs.
If you want more RP than you could use up in a lifetime of cooking, you can make it all in one weeks worth of effort and planning. However it IS dangerous. Exactly what it has to be to keep you from getting too damn cocky.
Producing phosphorus back in 1872 is REALLY SCARY! The welder/carbon electrodes are what makes the clandestine pose I offered much more doable and way faster. Albiet there can be some risks, just like running with scissors.
the temprature of the arc and the fishtail flame is up around 1500C which is plenty hot enough to vaporise the phosphate material, when the material is vaporus, it is easy to move within a current of air. So you draw it via vacuum to the medium that it is most safely stored, water. when the vapor touches the water, it is cooled and it hardens into a solid. Being heavier than water it sinks to the bottom of the vessle in pieces known as White Phosphorus. All that remains is converting it to red.
You know I have an article from the 1920s on how to construct a benchtop electric arc furnace complete with water resistor, with which it is able to produce the arc from the common house 120v recepticle for melting small amounts of metal, and at the end of the article it suggests a fume cabinet be used for arsnic and phosphorus experiments "...as the fumes from these elements are quite poisonus..." From this I have to assume that a welder isn't even a must, just some AC from the wall... I will produce a write up on that furnace and the H2O resistor in its own post, unless it has been written by one who read the same???
Just don't attempt anything you aren't comfortable with, or unable to provide for with a minimum of the needed safety.