From ink to chilli powder, Arvind Kejriwal has been targeted in many ways through his tenure as the Delhi Chief Minister. But the most distasteful attack probably came on Thursday, when he stepped forward to address the public at an official event in the national capital.People in the front rows stood before him, coughing in chorus. The coughing -- which was obviously in mockery of his ailment -- resulted in some awkwardness at the event, until Union Ministers Nitin Gadkari and Harsh Vardhan came forward to shush the crowd.