Let me preface my sad, sorry tale of attachment parenting gone horribly awry by saying this: I do not think attachment parenting in and of itself is a bad thing. I'm not, in any way, shape or form, even approaching the territory of judging anyone's child-rearing choices or styles or anything of the sort; I am simply admitting that I personally maybe did attachment parenting wrong. (That said, I'm hardly the only mom to feel this way.)
As with so many things, it sounded like a good idea at the time. "The time" being when my first kid was born 12 years ago. I was a new mom, young, and, well, already ridiculously attached to my daughter -- she'd just spent 9 months inside my body, for god's sake! I couldn't even leave the poor child in her crib alone for an entire night without hyperventilating.