Misleading With An Honorable Cause

Ever heard the term, "Honesty is the best policy."? Have you ever thought that sometimes people throughout history have lied for a cause? Sometimes it is inevitable that you should lie. I call it misleading with an honorable cause. Now, I don't mean that you should lie for your own gain, or to savagely take some one down, I mean that you are hiding someone that is important to you, like the case of Anne Frank. She went into hiding, and they had to lie about the whereabouts of the family. The people who helped the slaves on the underground railway put their lives in danger for the sake of other people. That is the type of thing that is honorable enough to mislead someone. All too often we see people lying about their work, posessions, skills, and even standing. This has become a natural part of a lot of humans. I do believe that if there is a cause, honorable, then we should not lie, but mislead for an honorable cause. I know that half of the things that I say are crazy rambly stuff that sometimes does not make sense to many, but I want you to share your views on this. When do you think that it would be ok to lie? In other words, When is there an honorable enough cause so as to mislead someone. Do you think that the statement, honesty is the best policy, is always standing true? What is it about lying that hurts us and why is it a problem if it is a problem? What do you think about dishonest people? Would you ever befriend such people that would ever lie to your face? I know, I am starting to go into the other topic of friends, but still, what do you think?