After Trai chief’s Aadhaar stunt, UIDAI has issued an advisory advising people to refrain from posting the unique number on social media and internet.”People are advised to refrain from publicly putting their Aadhaar numbers on internet and social media and posing challenges to others,” UIDAI tweeted a while back.This advisory has come with reference to some news items appearing on social media reporting few people publicly posting their Aadhaar numbers on internet and social media and posing challenges to others. “Such activities are uncalled for and should be refrained as these are not in accordance with the law. Aadhaar is a unique identity which can be authenticated to prove one’s identity for various services, benefits and subsidies,” UIDAI added.”Also, it is advised that doing Aadhaar authentication through somebody else’s Aadhaar number or using someone else’s Aadhaar number for any purpose may amount to impersonation and thereby a criminal offence under the Aadhaar Act and Indian Penal Code.”UIDAI has also warned that any person indulging in such acts or abetting or inciting others to do so “makes themselves liable for prosecution and penal action under the law”. Telecom Regulatory Authority of India (Trai) Chairman R S Sharma had earlier dared hackers to harm him by posting his Aadhaar number on Twitter.While many on Twitter claimed victory over ‘leaking’ Sharma’s personal details post the challenge, the Trai chief asserted through multiple tweets and replies that the challenge had never been about phone numbers and other information but for causing harm using knowledge of his Aadhaar number.