That's funny....in my day it use to be pot. The kids back then would say: "Hey maaann, let's blow this scene (school) dude....let's go and get high maaaannn." and that was suppose to be the explanation as to why there were some school dropouts, etc.
And then a few years after that, it was TV itself that was the main cause of school kids droping out, and they said it would also rot out your brain and cause epileptic seizures...and so on.
The epileptic seizure part is probably real, but I don't know about rotting out your brain though.
Yeeaaah....Good times, good times.