Friedrich said another sentence, which I think in this circumstance shows a lot about her feeling: I'm tired of being a double-victim, not only do I have to suffer the abuse, I also have to keep silent about it and thereby protect the offender. I won't do this any longer. (translation by me, from here: http://www.stern.de/sport/sportwelt/hochspringerin-ariane-friedrich-stalker-outing-entfacht-facebook-debatte-1817050.html
) Unfortunately feeling oppressed doesn't make it right.
Her actions have been discussed quite controversely in Germany, there are people backing her and people denouncing her actions as irresponsible. Most people agree that she should be leading as an example and therefore her actions were wrong. Personally I think she knew what it was doing. She's a police detective at her day-job and has filed for sexual assault against the person sending the facebook message.. I think I remember an article where she said she'd collected the necessary data to identify him.
I don't have a good background in law, but what I've taken from newspaper articles published here, she won't face criminal charges if her claims are true or even if it turns out that she made an "honest mistake", namely if she received the email and picture from the account. However she could be facing civil charges for breaching the person's privacy, even if he is the right person (and from any other person living in a town with the same name (and there seem to be several of those). Privacy laws are a lot tougher in Germany than in the US, from what I have seen in newspaper articles from both countries. In Germany a newspaper is not allowed to print the full name or un-pixeled pictures of either the victim or the offender. A report about "george zimmerman and trayvon martin" with mugshots of both is unthinkable here. The last names would be appreviated and the faces in the pictures blacked out.
Her actions and the possible consequences have been covered in minutious detail. The fact that she's been molested (virtually) has gotten almost no coverage. Hence, personally, I think people will think thrice before doing this again in Germany.
Timing has been very off for Friedrich, who posted her public outing on Facebook only 2 weeks after an (innocent) 18yo almost got killed by an angry mob in Emden because of wrong accusations on social networks: http://www.thelocal.de/national/20120331-41681.html