Lmfao I had the same idea. "What exactly changed here?" Only with about 2 people I had the idea that there was a really noticeable change.
As with anything, a drug is a bad as what you make of it. The power is in the word "too much". Too much is always bad.
Too much alcohol. Too much cigarettes. Too much pot. Too much cocaine. Whatever.
However, some drugs can even have positive effects if you only do them once in x amount of time. So it's not always the drug that is bad, but usually the person that *abuses* it. I don't call it "using", I call it "abusing". ******, even coffee can have very negative effects if you drink too much or totally got dependent on it... Keep that in mind, at any time. Oh and; you always have a choice.