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Can you cite any peer-reviewed, published scientific studies that show that telling people to "get an effing life" is an effective therapeutic strategy for treating the mentally ill?
From my experience, when someone's brain isn't working right, yelling at them really doesn't help it work better.
It's like kicking a computer when it catches a virus. Okay, sure, you got to express some rage. Bet that felt good, huh? But your rage didn't help the computer one bit.
Usually the best thing to do is figure out what's really wrong, and work from there.