ummmmmm...a cig filteR? bro crack melts when u put heat on it...so the rock youd be smoking would melt into the filter, and youd effectively be smoking said filter. get some chore boy and cook off the chems....or better yet, dont start smoking crack. dont take this as an insult, but ur ignorance has sort of been revealed which leads me to believe youve either never smoked crack or maybe have a couple times.....so why not just stop now?