Hope you don't mind me copying some of your advice here:
"They know if someone is disrespecting them, that is a huge red flag and the person should not be trusted because they are likely some form of social predator, whether sexual or otherwise. [b]They do not go along to get along.[/b] They do not get led merrily down some slippery slope.
...The vast majority of the time, child molesters are someone the child knows and trusts, someone who has made an effort to get close and push the boundaries of what the child would accept. My sons have basically a zero tolerance policy for boundary violation, thus they were virtually immune to that type of predation."
I'm trying to communicate to her she is definitely not powerless. I used the example of a cat: Not very big or as powerful as a dog, but you still wouldn't pick it up and mess with it. She doesn't have to be as strong as the bullies, as long as they know she won't tolerate any (physical) abuse.
Teach your daughter she does not need your approval. Teach her to make her own decisions, even if sometimes other people don't like it. Help her figure out how to make good judgement calls in the face of difficult circumstances. Give her opportunities to make real choices and back them even if you do not like them. Let her know you don't like all of her choices but you accept them and respect her right to make them. Do not make her dependent on being liked and approved for everything she does.
The other thing we can do is raise kids with respect and good boundaries from the start. Although my son attracted bullies, he did not suffer unduly. He knew how to cope effectively. I was molested and raped as a child. As a parent, I enforced a strong policy of respecting boundaries. That empowered him to take action early with bullies and not tolerate small offenses and the inevitable escalation. Bullying and molesting work much the same way: The predator starts small and escalates. The most effective measures stop it early. Most approaches fail because they do not identify the problem or try to address it until it has already gone too far.
I have previously written about the policy I had at home which empowered him to deal effectively with bullies: http://www.kidslikemine.com/2012/06/13/an-invisible-shield-h...