Can thieves not complain against theft?

The recent allegations of corruption against team Anna have got me thinking. The trigger was Shekhar Gupta’s ( Indian Express ) editorial. It made the point that those who are themselves corrupt have no right to spearhead any anti-corruption campaign.
I think Shekhar is mixing issues. One is the accountability of corrupt people for their act of corruption. The other is their right to seek a just system, regardless of their own proclivities.
I do not agree that thieves do not have a right to register a complaint against theft or seek to protect their houses against possible theft. The state can not restrict dispensation of justice only to the untarnished.
In the legal system, an attack on the reputation of the accused is NOT permitted, at least till the point where the law declares the accused to be guilty or not guilty. This provision is specifically to keep the issue of crime and reputation of the accused separate from each other.
During the team Anna campaign at Hissar, people quizzed them as to why they were indirectly campaigning for those who themselves had corruption cases pending against them. The reply was instant and clear. It was because those candidates had publicly backed the Lokpal bill. That means that they were willing to bring in a legislation which, if they continue with their corrupt ways in future too, will trap them viciously. So is the case with team Anna too. They are working to usher in a system which can punish them severely.
If team Anna had been seeking pardon for their alleged corrupt acts only because they are champions of the Jan Lokpal Bill, I would find fault with them. But not in this case. The good that can come out of their campaign can not be sacrificed just to smite them. Also, it would be illegal.