Didn't ever hear of the pen 15 club. But i was a general asshole in middle school. One time I was in detention, which was just a small storage closet in the principal's office. I overheard they were going to do a 'surprise' locker inspection the next morning.
So I decided to take a few sticks of chalk and crush them up, put them in a baggie, and toss em in another kids locker behind his books. Yeah, they found them and assumed drugs. Sent it off to be tested. Also had a long talk with the kid. He sweated it out for several days until the results came back.