I have been feeling awful about this for days now since I first read it, and responded, and if the OP feels like shit well she isn't alone.
The thing is we were presented with a scenario - a situation - not with a person, not with any idea of the person's motives or where they had got the idea, or anything else. Or what they had been through previously which obviously is terrible.
We were commenting on a scenario and an action, with very little to go on except what she was doing, and what she said about it.
Had she presented herself as someone who had been advised to do this, but actually was willing to listen to advice - which was almost exclusively not to do it - it would have met with a far less harsh response.
This just goes to show how much a crying baby can affect a mother, or father I guess, even if it isn't your own baby. Many of us have been upset on behalf of this baby, imagining it crying, and wanting to do something about it - even though we have never met the baby or its mother.
It turns out she is actually a brilliant mother, from what she has posted, and wants to do what is best for her son, but how were we to know that before? She gave us a snapshot and we reacted to it because it was all we had and it was very painful to read.
I still feel bad for making her feel bad. As you will know if you know me on here it isn't my normal MO to be so extreme. But given the info we had I think many of us struggled to respond with anything other than shock and sadness.
Anyway, I hope that the OP does stay. Or at least doesn't leave on our account.