You are right. There is nothing for AH to comment on Kiran Bedi / Prashant Bhushan etc. It is those only people, who feel that their selfish and corrupt interest will be threatened by AH's movement, who are restless and trying to make a issue where none exists.
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When you are a public figure and represent people's hopes and aspirations, it is not proper to keep an indefinite silence and speak only when you wish to. Then what is the difference between Anna and Sonia / Rahul who speak when their research on the topic is complete and not when people want to hear them.