No, generally, as much as I've seen, the ends rarely justify the means. One has to take morals and values in consideration when embarking on a venture.
Sometimes ignoring established values when setting out to meet an end may sometimes undermine the effect or longevity of the achieved objective.
No, they do not. The means, regardless of their outcome should be ethically carried out with honour and integrity and with due consideratin to all who are impacted by them. If it was done otherwise would the ends not be tainted with shame, perhaps loathing and personal disrespect. The right way to the ends is not always the easy way but it is the striving to be right that is the best of humanity.