She has not lead anybody on, she has stated that she was deliberating the issue. Your dissapointment that she does not run does not make her guilty of leading you on.
Take her for her word. Its her choice, and I suspect that it has a lot to do with how Cain preforms in the next ten days. I believe she wants what is best for America, its not about her.
“Does that prohibit me from being out there, out of a box, not allowing handlers to shape me and to force my message to be what donors or what contributors or what pundits want it to be?Does a title take away my freedom to call it like I see it and to affect positive change that we need in this country? That’s the biggest contemplation piece in my process." — Sarah Palin