well the past few posts had nothing to do with it, you had to be that guy and bring it up again. the term, "black maling thread" sounds like its a pretty normal thing to find. how often do you see them?
Take the high road and be the cool older brother. Smoke her out and teach her the ropes. Introduce her to interesting characters, and have her hooked up. Slowly, over time, have her try better, more intense drugs. Teach her the many methods for passing UAs and swabs. Make her the fun, loving party girl slut we all know. Once her grades start to slip, introduce her to meth, moly, and heroin. Send her down a destructive, downward spiral in which she may never escape. Laugh as she chases the dragon. That bitch deserves it. Sweet revenge.
HOLY SHIT LOL HAHAHAHAHHA. funniest stuff I have read in a awhile