I agree, they can be beneficial. Unfortunately, they have a negative stigma due to people that jump on with no knowledge, messing themselves up bad, and the kids who start up, knowing nothing about ancillaries and pct, and end up with breasts bigger than their sister's. You can still see examples of this all over the net and lots on this site, even. I wish I had a quarter for every thread that read something similar to,
"Help! I started my first cycle and now I have gyno... what's PCT?"