What's so difficult about the thread under discussion here is that it's difficult to reconcile the OP's right to anonymity with the sense of obligation we all feel to protect her DCs. I just had a look on the Samaritans and Child Lines' websites for their own codes of practice for dealing with these types of situations. As you'll see from the bits I've cut and pasted below, the same tension between adult privacy and the need for child advocacy is present.
Samaritans:
What is the information used for?
Samaritans only use a caller?s information to provide that caller with emotional support.
All information relating to a caller is confidential to Samaritans unless:
We have informed consent from the caller to pass on information
We call an ambulance because a caller appears to be incapable of making rational decisions for him or herself
We receive a court order requiring us to divulge information
We are passed information about acts of terrorism or bomb warnings
A caller attacks or threatens volunteers
A caller deliberately prevents the service from being delivered to other callers
Samaritans maintain confidentiality even after the death of a caller.
Child Line:
You say you might need to tell someone if you?re very worried about me or someone else. What does this mean?
You can talk to ChildLine about anything that is important to you, no matter how big or small it might seem. There are some things that we think are too big to keep between you and ChildLine, and we will talk to you about whether other people need to know. what?s happening.
We may want to tell someone else what is happening if:
We think your life or someone else?s life is in danger
You've told us that someone is hurting you, who might be hurting other people too - like a teacher who works with other children
You?ve told us that you have been hurting another person which makes us worried about their safety.
I think the one concession we could make would be to say that if anyone here feels genuinely compelled to report the anecdotal abuse of a child as posted on here, then the reporter should inform the OP of their intention to do it first - as the victim's consent for someone to act on their behalf seems to be the common factor in taking these things down more official routes.