This is very serious and alarming but not uncommon.
You are absolutely right about being worried for her well-being and integrity since exposing to such a stranger when openly revealing all those destructive situations is never good.
I recommend you being just plain honest with her about how you happen to read about it, apologize and express your deep concern about it.
She is a minor and you are accountable for her integrity, so boundaries need to be set about what is and what is not acceptable around relationship, sharing and doing online.
Without open communication and trust there is no way a parent could support a child, especially at this age when many challenges do appear and no matter how smart an adolescent could be, that would mean nothing when facing real life challenges which require life experience and much more assertiveness and adult good judgment.
Use this situation to work on developing a better and loser communication with your daughter so you could become a better supporter and help her when facing challenging or risky situations.
I hope this helps.
I did discuss this with her recently when I noticed she had had some correspondence on tumblr with an unknown person, with the reult that she unfriended me from her facebook.. You're right that I have to get tough, but how?
it's true that she's always been secretive about this kind of thing, and i can't find a way of getting in - she's open in other ways, but not this
You are accountable for her integrity and she must be responsible for her actions since she is old enough to understand what is ok and what is not. New boundaries need to be set .
One thing is normal privacy a parent must respect, but the use of technology for activities like this is unacceptable, just as you would not agree for her to meet older people behind your back, even more if they happen to be strangers, adults, and even worse with unacceptable or illegal tendencies-behaviors- or mental disorders
Teenagers and parents need to be clear about limits and boundaries so they could implement the right ones whole respecting children privacy. Remember, they must be accountable for their actions and you too for the way you take care of their integrity. If she uses technology in ways that are unacceptable exposing herself to risky situation like this, then she should not be allowed to such benefit once she shows no accountability and maturity for a sound use of it.
ok so a ban on facebook?
with clear explanation why..