Oh god, hopeless.... I cant stand to even see it, when someone, just puts a piece of chore boy or brillo, into a pipe, and without burning off any excess smoke, just takes a hit, inhaling all of that metal smoke or vapor, or whatever the hell it is.. it makes me sick to see someone do that, I have always burned or "cured" that shit, before just throwing a piece in and blasting off.. was taught how to smoke hard from a crack veteran! this guy knew everything there was to know about that shit, and had been doing it since the day it came out, supposedly.. I believe it! Anyways, yes... crack can be very bad for your lungs alone, even without counting any excess other fumes you inhale, depending on your piece/way you smoke it, and what its made from.. I have coughed up black shit, many of times.. after a long crack binge, and also after taking too big a hit and swallowing crack smoke/vapor, have thrown up totally black looking nasty shit.. so fucking gross.. that shit, will fuck your life up.. been there done that! For many years I was an addict to IV coke and crack smoking! now I am just the casual every once a month user of coke.. or crack. I like it better that way!