I remember the first few pots I melted down. The guys had me scared to death that eventually my pot would explode. It was not a question of if but when, lol. This is one of those things that you understand has necessary hyperbole because if there was not any exaggeration, neophytes would not heed precautions. Its a rite of passage, standing there dressed like you are a scientist taking samples during nuclear winter over your little lead pot. Pretty soon you learn that its like most things in life. When the potential risk to family jewels is increased act accordingly. I wear a mask when 'smelting', I just wear my glasses when pouring boolits.
For new guys, don't be scared, but do not underestimate the amount of hurt 20 pounds of 700 degree lead can deliver either. This is another example of casters making things much more difficult than need be. Is there no happy medium with you people?